668272999 has 8 divisors (see below), whose sum is σ = 684109440. Its totient is φ = 652587000.

The previous prime is 668272993. The next prime is 668273003. The reversal of 668272999 is 999272866.

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

It is a cyclic number.

It is not a de Polignac number, because 668272999 - 2³ = 668272991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668272991) 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, 28597 + ... + 46414.

It is an arithmetic number, because the mean of its divisors is an integer number (85513680).

Almost surely, 2^668272999 is an apocalyptic number.

668272999 is a deficient number, since it is larger than the sum of its proper divisors (15836441).

668272999 is a wasteful number, since it uses less digits than its factorization.

668272999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75221.

The product of its digits is 5878656, while the sum is 58.

The square root of 668272999 is about 25850.9767513725. The cubic root of 668272999 is about 874.2815322369.

The spelling of 668272999 in words is "six hundred sixty-eight million, two hundred seventy-two thousand, nine hundred ninety-nine".