66565622376 has 48 divisors (see below), whose sum is σ = 196671159360. Its totient is φ = 20171400480.

The previous prime is 66565622359. The next prime is 66565622401. The reversal of 66565622376 is 67322656566.

66565622376 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 5 + 622 + 3 + 7 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42022960 + ... + 42024543.

It is an arithmetic number, because the mean of its divisors is an integer number (4097315820).

Almost surely, 2^66565622376 is an apocalyptic number.

66565622376 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66565622376 is an abundant number, since it is smaller than the sum of its proper divisors (130105536984).

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

66565622376 is a wasteful number, since it uses less digits than its factorization.

66565622376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84047526 (or 84047519 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 54.

The spelling of 66565622376 in words is "sixty-six billion, five hundred sixty-five million, six hundred twenty-two thousand, three hundred seventy-six".