74172666 has 16 divisors (see below), whose sum is σ = 157071744. Its totient is φ = 23269824.

The previous prime is 74172643. The next prime is 74172697. The reversal of 74172666 is 66627147.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363490 + ... + 363693.

It is an arithmetic number, because the mean of its divisors is an integer number (9816984).

Almost surely, 2^74172666 is an apocalyptic number.

74172666 is an abundant number, since it is smaller than the sum of its proper divisors (82899078).

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

74172666 is a wasteful number, since it uses less digits than its factorization.

74172666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727205.

The product of its digits is 84672, while the sum is 39.

The square root of 74172666 is about 8612.3554269433. The cubic root of 74172666 is about 420.1599277571.

The spelling of 74172666 in words is "seventy-four million, one hundred seventy-two thousand, six hundred sixty-six".