2666535172840 has 1152 divisors, whose sum is σ = 8359523948160. Its totient is φ = 755951616000.

The previous prime is 2666535172823. The next prime is 2666535172853. The reversal of 2666535172840 is 482715356662.

It is a super-2 number, since 2×2666535172840² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 36527879044 + ... + 36527879116.

It is an arithmetic number, because the mean of its divisors is an integer number (7256531205).

Almost surely, 2^{2666535172840} is an apocalyptic number.

2666535172840 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 2666535172840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4179761974080).

2666535172840 is an abundant number, since it is smaller than the sum of its proper divisors (5692988775320).

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

2666535172840 is a wasteful number, since it uses less digits than its factorization.

2666535172840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 2666535172840 in words is "two trillion, six hundred sixty-six billion, five hundred thirty-five million, one hundred seventy-two thousand, eight hundred forty".