66442892 has 12 divisors (see below), whose sum is σ = 116527320. Its totient is φ = 33149376.

The previous prime is 66442891. The next prime is 66442903. The reversal of 66442892 is 29824466.

It is not an unprimeable number, because it can be changed into a prime (66442891) 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, 15917 + ... + 19652.

It is an arithmetic number, because the mean of its divisors is an integer number (9710610).

Almost surely, 2^66442892 is an apocalyptic number.

It is an amenable number.

66442892 is a deficient number, since it is larger than the sum of its proper divisors (50084428).

66442892 is a wasteful number, since it uses less digits than its factorization.

66442892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36040 (or 36038 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 66442892 is about 8151.2509469406. The cubic root of 66442892 is about 405.0259435700.

The spelling of 66442892 in words is "sixty-six million, four hundred forty-two thousand, eight hundred ninety-two".