66772624 has 20 divisors (see below), whose sum is σ = 130170736. Its totient is φ = 33180192.

The previous prime is 66772609. The next prime is 66772627. The reversal of 66772624 is 42627766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66772627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10194 + ... + 15409.

Almost surely, 2^66772624 is an apocalyptic number.

It is an amenable number.

66772624 is a deficient number, since it is larger than the sum of its proper divisors (63398112).

66772624 is a wasteful number, since it uses less digits than its factorization.

66772624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25774 (or 25768 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 66772624 is about 8171.4517681988. The cubic root of 66772624 is about 405.6948372990.

The spelling of 66772624 in words is "sixty-six million, seven hundred seventy-two thousand, six hundred twenty-four".