66313774672 has 20 divisors (see below), whose sum is σ = 131216619456. Its totient is φ = 32451421280.

The previous prime is 66313774663. The next prime is 66313774679. The reversal of 66313774672 is 27647731366.

It is a super-2 number, since 2×66313774672² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66313774679) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 44090854 + ... + 44092357.

Almost surely, 2^66313774672 is an apocalyptic number.

It is an amenable number.

66313774672 is a deficient number, since it is larger than the sum of its proper divisors (64902844784).

66313774672 is a wasteful number, since it uses less digits than its factorization.

66313774672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88183266 (or 88183260 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 52.

The spelling of 66313774672 in words is "sixty-six billion, three hundred thirteen million, seven hundred seventy-four thousand, six hundred seventy-two".