6626628840 has 128 divisors (see below), whose sum is σ = 21606076800. Its totient is φ = 1616163840.

The previous prime is 6626628823. The next prime is 6626628857. The reversal of 6626628840 is 488266266.

It is an interprime number because it is at equal distance from previous prime (6626628823) and next prime (6626628857).

It is a self number, because there is not a number n which added to its sum of digits gives 6626628840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150555 + ... + 189525.

It is an arithmetic number, because the mean of its divisors is an integer number (168797475).

Almost surely, 2^6626628840 is an apocalyptic number.

6626628840 is a gapful number since it is divisible by the number (60) 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 6626628840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10803038400).

6626628840 is an abundant number, since it is smaller than the sum of its proper divisors (14979447960).

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

6626628840 is a wasteful number, since it uses less digits than its factorization.

6626628840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39107 (or 39103 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The square root of 6626628840 is about 81404.1082501369. The cubic root of 6626628840 is about 1878.2967862207.

The spelling of 6626628840 in words is "six billion, six hundred twenty-six million, six hundred twenty-eight thousand, eight hundred forty".