66379172 has 24 divisors (see below), whose sum is σ = 117694080. Its totient is φ = 32755680.

The previous prime is 66379171. The next prime is 66379177. The reversal of 66379172 is 27197366.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66379171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153797 + ... + 154227.

It is an arithmetic number, because the mean of its divisors is an integer number (4903920).

Almost surely, 2^66379172 is an apocalyptic number.

It is an amenable number.

66379172 is a deficient number, since it is larger than the sum of its proper divisors (51314908).

66379172 is a wasteful number, since it uses less digits than its factorization.

66379172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 849 counting only the distinct ones).

The product of its digits is 95256, while the sum is 41.

The square root of 66379172 is about 8147.3414068640. The cubic root of 66379172 is about 404.8964262911.

The spelling of 66379172 in words is "sixty-six million, three hundred seventy-nine thousand, one hundred seventy-two".