66312678634 has 32 divisors (see below), whose sum is σ = 106829767296. Its totient is φ = 30759206400.

The previous prime is 66312678589. The next prime is 66312678671. The reversal of 66312678634 is 43687621366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4427859 + ... + 4442809.

It is an arithmetic number, because the mean of its divisors is an integer number (3338430228).

Almost surely, 2^66312678634 is an apocalyptic number.

66312678634 is a deficient number, since it is larger than the sum of its proper divisors (40517088662).

66312678634 is a wasteful number, since it uses less digits than its factorization.

66312678634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16830.

The product of its digits is 5225472, while the sum is 52.

The spelling of 66312678634 in words is "sixty-six billion, three hundred twelve million, six hundred seventy-eight thousand, six hundred thirty-four".