66373992 has 112 divisors (see below), whose sum is σ = 196740000. Its totient is φ = 20925216.

The previous prime is 66373981. The next prime is 66374017. The reversal of 66373992 is 29937366.

66373992 is a `hidden beast` number, since 6 + 637 + 3 + 9 + 9 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 110509 + ... + 111107.

Almost surely, 2^66373992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66373992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98370000).

66373992 is an abundant number, since it is smaller than the sum of its proper divisors (130366008).

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

66373992 is a wasteful number, since it uses less digits than its factorization.

66373992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 623 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 66373992 is about 8147.0235055510. The cubic root of 66373992 is about 404.8858937802.

The spelling of 66373992 in words is "sixty-six million, three hundred seventy-three thousand, nine hundred ninety-two".