668925266 has 8 divisors (see below), whose sum is σ = 1012765680. Its totient is φ = 331336708.

The previous prime is 668925247. The next prime is 668925287. The reversal of 668925266 is 662529866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×668925266² = 894922022986341512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562696 + ... + 1563123.

It is an arithmetic number, because the mean of its divisors is an integer number (126595710).

Almost surely, 2^668925266 is an apocalyptic number.

668925266 is a deficient number, since it is larger than the sum of its proper divisors (343840414).

668925266 is a wasteful number, since it uses less digits than its factorization.

668925266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125928.

The product of its digits is 1866240, while the sum is 50.

The square root of 668925266 is about 25863.5895807214. The cubic root of 668925266 is about 874.5658868635.

The spelling of 668925266 in words is "six hundred sixty-eight million, nine hundred twenty-five thousand, two hundred sixty-six".