668368790 has 16 divisors (see below), whose sum is σ = 1203422400. Its totient is φ = 267267840.

The previous prime is 668368781. The next prime is 668368817. The reversal of 668368790 is 97863866.

It is a congruent number.

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, 34886 + ... + 50534.

It is an arithmetic number, because the mean of its divisors is an integer number (75213900).

Almost surely, 2^668368790 is an apocalyptic number.

668368790 is a deficient number, since it is larger than the sum of its proper divisors (535053610).

668368790 is a wasteful number, since it uses less digits than its factorization.

668368790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19927.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 668368790 is about 25852.8294389608. The cubic root of 668368790 is about 874.3233037390.

The spelling of 668368790 in words is "six hundred sixty-eight million, three hundred sixty-eight thousand, seven hundred ninety".