2537666820 has 480 divisors, whose sum is σ = 9289082880. Its totient is φ = 578223360.

The previous prime is 2537666819. The next prime is 2537666821. The reversal of 2537666820 is 286667352.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2537666819) and next prime (2537666821).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2537666821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 81860205 + ... + 81860235.

It is an arithmetic number, because the mean of its divisors is an integer number (19352256).

Almost surely, 2^2537666820 is an apocalyptic number.

2537666820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2537666820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4644541440).

2537666820 is an abundant number, since it is smaller than the sum of its proper divisors (6751416060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2537666820 is a wasteful number, since it uses less digits than its factorization.

2537666820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 2537666820 is about 50375.2599993290. The cubic root of 2537666820 is about 1363.9910912064.

The spelling of 2537666820 in words is "two billion, five hundred thirty-seven million, six hundred sixty-six thousand, eight hundred twenty".