668277699 has 16 divisors (see below), whose sum is σ = 903552000. Its totient is φ = 439298496.

The previous prime is 668277691. The next prime is 668277751. The reversal of 668277699 is 996772866.

It is not a de Polignac number, because 668277699 - 2³ = 668277691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668277691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69327 + ... + 78375.

It is an arithmetic number, because the mean of its divisors is an integer number (56472000).

Almost surely, 2^668277699 is an apocalyptic number.

668277699 is a deficient number, since it is larger than the sum of its proper divisors (235274301).

668277699 is a wasteful number, since it uses less digits than its factorization.

668277699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9394.

The product of its digits is 13716864, while the sum is 60.

The square root of 668277699 is about 25851.0676568686. The cubic root of 668277699 is about 874.2835818551.

The spelling of 668277699 in words is "six hundred sixty-eight million, two hundred seventy-seven thousand, six hundred ninety-nine".