66537658868 has 12 divisors (see below), whose sum is σ = 116496711072. Its totient is φ = 33252884280.

The previous prime is 66537658823. The next prime is 66537658877. The reversal of 66537658868 is 86885673566.

It is a junction number, because it is equal to n+sod(n) for n = 66537658798 and 66537658807.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3976898 + ... + 3993593.

It is an arithmetic number, because the mean of its divisors is an integer number (9708059256).

Almost surely, 2^66537658868 is an apocalyptic number.

It is an amenable number.

66537658868 is a deficient number, since it is larger than the sum of its proper divisors (49959052204).

66537658868 is a wasteful number, since it uses less digits than its factorization.

66537658868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972582 (or 7972580 counting only the distinct ones).

The product of its digits is 348364800, while the sum is 68.

The spelling of 66537658868 in words is "sixty-six billion, five hundred thirty-seven million, six hundred fifty-eight thousand, eight hundred sixty-eight".