66136064656 has 40 divisors (see below), whose sum is σ = 133776527040. Its totient is φ = 31614523776.

The previous prime is 66136064651. The next prime is 66136064677. The reversal of 66136064656 is 65646063166.

It is a super-2 number, since 2×66136064656² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66136064651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711735 + ... + 799273.

It is an arithmetic number, because the mean of its divisors is an integer number (3344413176).

Almost surely, 2^66136064656 is an apocalyptic number.

It is an amenable number.

66136064656 is an abundant number, since it is smaller than the sum of its proper divisors (67640462384).

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

66136064656 is a wasteful number, since it uses less digits than its factorization.

66136064656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89623 (or 89617 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 66136064656 in words is "sixty-six billion, one hundred thirty-six million, sixty-four thousand, six hundred fifty-six".