66572951634 has 96 divisors (see below), whose sum is σ = 175525459200. Its totient is φ = 18193811328.

The previous prime is 66572951629. The next prime is 66572951663. The reversal of 66572951634 is 43615927566.

66572951634 is a `hidden beast` number, since 6 + 6 + 572 + 9 + 5 + 1 + 63 + 4 = 666.

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 47 ways as a sum of consecutive naturals, for example, 92407 + ... + 376410.

It is an arithmetic number, because the mean of its divisors is an integer number (1828390200).

Almost surely, 2^66572951634 is an apocalyptic number.

66572951634 is an abundant number, since it is smaller than the sum of its proper divisors (108952507566).

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

66572951634 is a wasteful number, since it uses less digits than its factorization.

66572951634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468869 (or 468852 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 54.

The spelling of 66572951634 in words is "sixty-six billion, five hundred seventy-two million, nine hundred fifty-one thousand, six hundred thirty-four".