668769627 has 16 divisors (see below), whose sum is σ = 919526400. Its totient is φ = 432114432.

The previous prime is 668769623. The next prime is 668769637. The reversal of 668769627 is 726967866.

It is a happy number.

It is not a de Polignac number, because 668769627 - 2² = 668769623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668769623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8502 + ... + 37547.

It is an arithmetic number, because the mean of its divisors is an integer number (57470400).

Almost surely, 2^668769627 is an apocalyptic number.

668769627 is a deficient number, since it is larger than the sum of its proper divisors (250756773).

668769627 is a wasteful number, since it uses less digits than its factorization.

668769627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46202.

The product of its digits is 9144576, while the sum is 57.

The square root of 668769627 is about 25860.5805619286. The cubic root of 668769627 is about 874.4980531182.

The spelling of 668769627 in words is "six hundred sixty-eight million, seven hundred sixty-nine thousand, six hundred twenty-seven".