668869627 has 2 divisors, whose sum is σ = 668869628. Its totient is φ = 668869626.

The previous prime is 668869583. The next prime is 668869631. The reversal of 668869627 is 726968866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668869627 - 2⁷ = 668869499 is a prime.

It is not a weakly prime, because it can be changed into another prime (668869637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334434813 + 334434814.

It is an arithmetic number, because the mean of its divisors is an integer number (334434814).

Almost surely, 2^668869627 is an apocalyptic number.

668869627 is a deficient number, since it is larger than the sum of its proper divisors (1).

668869627 is an equidigital number, since it uses as much as digits as its factorization.

668869627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The square root of 668869627 is about 25862.5139342640. The cubic root of 668869627 is about 874.5416383547.

The spelling of 668869627 in words is "six hundred sixty-eight million, eight hundred sixty-nine thousand, six hundred twenty-seven".