66481384162176 has 128 divisors (see below), whose sum is σ = 196747061030400. Its totient is φ = 22100078237184.

The previous prime is 66481384162139. The next prime is 66481384162189. The reversal of 66481384162176 is 67126148318466.

66481384162176 is a `hidden beast` number, since 6 + 6 + 4 + 81 + 384 + 1 + 6 + 2 + 176 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 24939430 + ... + 27476133.

It is an arithmetic number, because the mean of its divisors is an integer number (1537086414300).

Almost surely, 2^{66481384162176} is an apocalyptic number.

It is an amenable number.

66481384162176 is an abundant number, since it is smaller than the sum of its proper divisors (130265676868224).

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

66481384162176 is a wasteful number, since it uses less digits than its factorization.

66481384162176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52415953 (or 52415935 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 66481384162176 in words is "sixty-six trillion, four hundred eighty-one billion, three hundred eighty-four million, one hundred sixty-two thousand, one hundred seventy-six".