6656464726137 has 24 divisors (see below), whose sum is σ = 9838722283104. Its totient is φ = 4334342310144.

The previous prime is 6656464726129. The next prime is 6656464726139. The reversal of 6656464726137 is 7316274646566.

6656464726137 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 4 + 6 + 4 + 7 + 2 + 613 + 7 = 666.

It is not a de Polignac number, because 6656464726137 - 2³ = 6656464726129 is a prime.

It is a super-2 number, since 2×6656464726137² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6656464726139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19034698 + ... + 19381244.

It is an arithmetic number, because the mean of its divisors is an integer number (409946761796).

Almost surely, 2^{6656464726137} is an apocalyptic number.

It is an amenable number.

6656464726137 is a deficient number, since it is larger than the sum of its proper divisors (3182257556967).

6656464726137 is a wasteful number, since it uses less digits than its factorization.

6656464726137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396229 (or 396226 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 63.

The spelling of 6656464726137 in words is "six trillion, six hundred fifty-six billion, four hundred sixty-four million, seven hundred twenty-six thousand, one hundred thirty-seven".