665643314 has 16 divisors (see below), whose sum is σ = 1144220928. Its totient is φ = 284496192.

The previous prime is 665643301. The next prime is 665643331. The reversal of 665643314 is 413346566.

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, 59639 + ... + 69914.

It is an arithmetic number, because the mean of its divisors is an integer number (71513808).

Almost surely, 2^665643314 is an apocalyptic number.

665643314 is a deficient number, since it is larger than the sum of its proper divisors (478577614).

665643314 is a wasteful number, since it uses less digits than its factorization.

665643314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129929.

The product of its digits is 155520, while the sum is 38.

The square root of 665643314 is about 25800.0642247263. The cubic root of 665643314 is about 873.1332453776.

The spelling of 665643314 in words is "six hundred sixty-five million, six hundred forty-three thousand, three hundred fourteen".