666100494 has 36 divisors (see below), whose sum is σ = 1533118704. Its totient is φ = 208971072.

The previous prime is 666100489. The next prime is 666100543. The reversal of 666100494 is 494001666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 58822 + ... + 69225.

Almost surely, 2^666100494 is an apocalyptic number.

666100494 is an abundant number, since it is smaller than the sum of its proper divisors (867018210).

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

666100494 is a wasteful number, since it uses less digits than its factorization.

666100494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128089 (or 128069 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 666100494 is about 25808.9227593869. The cubic root of 666100494 is about 873.3330960057. Note that the first 3 decimals are identical.

The spelling of 666100494 in words is "six hundred sixty-six million, one hundred thousand, four hundred ninety-four".