668526977 has 8 divisors (see below), whose sum is σ = 684658656. Its totient is φ = 652421952.

The previous prime is 668526967. The next prime is 668527003. The reversal of 668526977 is 779625866.

668526977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 668526977 - 2⁸ = 668526721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668526907) 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, 49778 + ... + 61764.

It is an arithmetic number, because the mean of its divisors is an integer number (85582332).

Almost surely, 2^668526977 is an apocalyptic number.

It is an amenable number.

668526977 is a deficient number, since it is larger than the sum of its proper divisors (16131679).

668526977 is a wasteful number, since it uses less digits than its factorization.

668526977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13327.

The product of its digits is 7620480, while the sum is 56.

The square root of 668526977 is about 25855.8886329594. Note that the first 3 decimals coincide. The cubic root of 668526977 is about 874.3922754767.

The spelling of 668526977 in words is "six hundred sixty-eight million, five hundred twenty-six thousand, nine hundred seventy-seven".