66189192 has 16 divisors (see below), whose sum is σ = 165473040. Its totient is φ = 22063056.

The previous prime is 66189187. The next prime is 66189203. The reversal of 66189192 is 29198166.

It is a super-2 number, since 2×66189192² = 8762018275225728, which contains 22 as substring.

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, 1378918 + ... + 1378965.

It is an arithmetic number, because the mean of its divisors is an integer number (10342065).

Almost surely, 2^66189192 is an apocalyptic number.

It is an amenable number.

66189192 is an abundant number, since it is smaller than the sum of its proper divisors (99283848).

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

66189192 is a wasteful number, since it uses less digits than its factorization.

66189192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757892 (or 2757888 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 66189192 is about 8135.6740347681. The cubic root of 66189192 is about 404.5097802868.

The spelling of 66189192 in words is "sixty-six million, one hundred eighty-nine thousand, one hundred ninety-two".