66572572836 has 48 divisors (see below), whose sum is σ = 193665669120. Its totient is φ = 17291577120.

The previous prime is 66572572817. The next prime is 66572572889. The reversal of 66572572836 is 63827527566.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 36023196 + ... + 36025043.

It is an arithmetic number, because the mean of its divisors is an integer number (4034701440).

Almost surely, 2^66572572836 is an apocalyptic number.

66572572836 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66572572836 is an abundant number, since it is smaller than the sum of its proper divisors (127093096284).

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

66572572836 is a wasteful number, since it uses less digits than its factorization.

66572572836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72048264 (or 72048262 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 57.

The spelling of 66572572836 in words is "sixty-six billion, five hundred seventy-two million, five hundred seventy-two thousand, eight hundred thirty-six".