66195984 has 40 divisors (see below), whose sum is σ = 172157632. Its totient is φ = 21916800.

The previous prime is 66195973. The next prime is 66196007. The reversal of 66195984 is 48959166.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682 + ... + 11814.

Almost surely, 2^66195984 is an apocalyptic number.

It is an amenable number.

66195984 is an abundant number, since it is smaller than the sum of its proper divisors (105961648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66195984 is a wasteful number, since it uses less digits than its factorization.

66195984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9295 (or 9289 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 66195984 is about 8136.0914449138. The cubic root of 66195984 is about 404.5236160626.

The spelling of 66195984 in words is "sixty-six million, one hundred ninety-five thousand, nine hundred eighty-four".