6657930397566 has 48 divisors (see below), whose sum is σ = 16486503696000. Its totient is φ = 1902242767824.

The previous prime is 6657930397561. The next prime is 6657930397567.

6657930397566 is a `hidden beast` number, since 6 + 6 + 57 + 9 + 3 + 0 + 3 + 9 + 7 + 566 = 666.

6657930397566 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6657930397494 and 6657930397503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657930397561) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 11982985 + ... + 12526283.

It is an arithmetic number, because the mean of its divisors is an integer number (343468827000).

Almost surely, 2^{6657930397566} is an apocalyptic number.

6657930397566 is an abundant number, since it is smaller than the sum of its proper divisors (9828573298434).

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

6657930397566 is a wasteful number, since it uses less digits than its factorization.

6657930397566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640573 (or 640570 counting only the distinct ones).

The product of its (nonzero) digits is 1157360400, while the sum is 72.

The spelling of 6657930397566 in words is "six trillion, six hundred fifty-seven billion, nine hundred thirty million, three hundred ninety-seven thousand, five hundred sixty-six".