666430244 has 24 divisors (see below), whose sum is σ = 1281013440. Its totient is φ = 301951584.

The previous prime is 666430231. The next prime is 666430279. The reversal of 666430244 is 442034666.

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, 188879 + ... + 192374.

It is an arithmetic number, because the mean of its divisors is an integer number (53375560).

Almost surely, 2^666430244 is an apocalyptic number.

It is an amenable number.

666430244 is a deficient number, since it is larger than the sum of its proper divisors (614583196).

666430244 is a wasteful number, since it uses less digits than its factorization.

666430244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381299 (or 381297 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 666430244 is about 25815.3102634851. The cubic root of 666430244 is about 873.4771854150.

The spelling of 666430244 in words is "six hundred sixty-six million, four hundred thirty thousand, two hundred forty-four".