74991666 has 16 divisors (see below), whose sum is σ = 154821888. Its totient is φ = 24190800.

The previous prime is 74991643. The next prime is 74991677. The reversal of 74991666 is 66619947.

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, 201405 + ... + 201776.

It is an arithmetic number, because the mean of its divisors is an integer number (9676368).

Almost surely, 2^74991666 is an apocalyptic number.

74991666 is an abundant number, since it is smaller than the sum of its proper divisors (79830222).

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

74991666 is a wasteful number, since it uses less digits than its factorization.

74991666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403217.

The product of its digits is 489888, while the sum is 48.

The square root of 74991666 is about 8659.7728607626. The cubic root of 74991666 is about 421.7007116993.

It can be divided in two parts, 74991 and 666, that added together give a palindrome (75657).

The spelling of 74991666 in words is "seventy-four million, nine hundred ninety-one thousand, six hundred sixty-six".