66013457132544 has 88 divisors (see below), whose sum is σ = 175952754206208. Its totient is φ = 22004132597760.

The previous prime is 66013457132533. The next prime is 66013457132563. The reversal of 66013457132544 is 44523175431066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250687989 + ... + 250951179.

Almost surely, 2^{66013457132544} is an apocalyptic number.

66013457132544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66013457132544 is an abundant number, since it is smaller than the sum of its proper divisors (109939297073664).

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

66013457132544 is a wasteful number, since it uses less digits than its factorization.

66013457132544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344861 (or 344843 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 66013457132544 in words is "sixty-six trillion, thirteen billion, four hundred fifty-seven million, one hundred thirty-two thousand, five hundred forty-four".