66877992 has 48 divisors (see below), whose sum is σ = 184991040. Its totient is φ = 21817248.

The previous prime is 66877991. The next prime is 66877999. The reversal of 66877992 is 29977866.

It is not an unprimeable number, because it can be changed into a prime (66877991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6498 + ... + 13265.

It is an arithmetic number, because the mean of its divisors is an integer number (3853980).

Almost surely, 2^66877992 is an apocalyptic number.

It is an amenable number.

66877992 is an abundant number, since it is smaller than the sum of its proper divisors (118113048).

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

66877992 is a wasteful number, since it uses less digits than its factorization.

66877992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19822 (or 19815 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 66877992 is about 8177.8965510698. The cubic root of 66877992 is about 405.9081222528.

The spelling of 66877992 in words is "sixty-six million, eight hundred seventy-seven thousand, nine hundred ninety-two".