66413205125256 has 64 divisors (see below), whose sum is σ = 181535787774720. Its totient is φ = 20079784262720.

The previous prime is 66413205125219. The next prime is 66413205125303. The reversal of 66413205125256 is 65252150231466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283816650 + ... + 284050553.

It is an arithmetic number, because the mean of its divisors is an integer number (2836496683980).

Almost surely, 2^{66413205125256} is an apocalyptic number.

66413205125256 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66413205125256 is an abundant number, since it is smaller than the sum of its proper divisors (115122582649464).

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

66413205125256 is a wasteful number, since it uses less digits than its factorization.

66413205125256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567867666 (or 567867662 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 66413205125256 in words is "sixty-six trillion, four hundred thirteen billion, two hundred five million, one hundred twenty-five thousand, two hundred fifty-six".