668204630 has 16 divisors (see below), whose sum is σ = 1203140304. Its totient is φ = 267199200.

The previous prime is 668204629. The next prime is 668204633. The reversal of 668204630 is 36402866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668204633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31805 + ... + 48455.

It is an arithmetic number, because the mean of its divisors is an integer number (75196269).

Almost surely, 2^668204630 is an apocalyptic number.

668204630 is a deficient number, since it is larger than the sum of its proper divisors (534935674).

668204630 is a wasteful number, since it uses less digits than its factorization.

668204630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20671.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 668204630 is about 25849.6543497200. The cubic root of 668204630 is about 874.2517161823.

The spelling of 668204630 in words is "six hundred sixty-eight million, two hundred four thousand, six hundred thirty".