656616625041330 has 80 divisors (see below), whose sum is σ = 1766243806893720. Its totient is φ = 175030858291968.

The previous prime is 656616625041313. The next prime is 656616625041397. The reversal of 656616625041330 is 33140526616656.

656616625041330 is a `hidden beast` number, since 6 + 5 + 6 + 6 + 1 + 6 + 625 + 0 + 4 + 1 + 3 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 653774221242081 + 2842403799249 = 25569009^2 + 1685943^2 .

It is a super-2 number, since 2×656616625041330² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 152759445 + ... + 156998984.

Almost surely, 2^{656616625041330} is an apocalyptic number.

656616625041330 is an abundant number, since it is smaller than the sum of its proper divisors (1109627181852390).

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

656616625041330 is a wasteful number, since it uses less digits than its factorization.

656616625041330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309761065 (or 309761056 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 54.

The spelling of 656616625041330 in words is "six hundred fifty-six trillion, six hundred sixteen billion, six hundred twenty-five million, forty-one thousand, three hundred thirty".