66765488 has 20 divisors (see below), whose sum is σ = 130694760. Its totient is φ = 33037824.

The previous prime is 66765469. The next prime is 66765493. The reversal of 66765488 is 88456766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19958 + ... + 23061.

It is an arithmetic number, because the mean of its divisors is an integer number (6534738).

Almost surely, 2^66765488 is an apocalyptic number.

It is an amenable number.

66765488 is a deficient number, since it is larger than the sum of its proper divisors (63929272).

66765488 is a wasteful number, since it uses less digits than its factorization.

66765488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43124 (or 43118 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 66765488 is about 8171.0151144151. The cubic root of 66765488 is about 405.6803845621.

The spelling of 66765488 in words is "sixty-six million, seven hundred sixty-five thousand, four hundred eighty-eight".