668889627 has 16 divisors (see below), whose sum is σ = 1038493440. Its totient is φ = 375010272.

The previous prime is 668889619. The next prime is 668889629. The reversal of 668889627 is 726988866.

It is not a de Polignac number, because 668889627 - 2³ = 668889619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668889629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299377 + ... + 301602.

It is an arithmetic number, because the mean of its divisors is an integer number (64905840).

Almost surely, 2^668889627 is an apocalyptic number.

668889627 is a deficient number, since it is larger than the sum of its proper divisors (369603813).

668889627 is a wasteful number, since it uses less digits than its factorization.

668889627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601042.

The product of its digits is 13934592, while the sum is 60.

The square root of 668889627 is about 25862.9005913877. The cubic root of 668889627 is about 874.5503548806.

The spelling of 668889627 in words is "six hundred sixty-eight million, eight hundred eighty-nine thousand, six hundred twenty-seven".