668277824 has 28 divisors (see below), whose sum is σ = 1328633868. Its totient is φ = 333504000.

The previous prime is 668277821. The next prime is 668277829. The reversal of 668277824 is 428772866.

It can be written as a sum of positive squares in 2 ways, for example, as 321126400 + 347151424 = 17920^2 + 18632^2 .

It is not an unprimeable number, because it can be changed into a prime (668277821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24974 + ... + 44274.

Almost surely, 2^668277824 is an apocalyptic number.

668277824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

668277824 is a deficient number, since it is larger than the sum of its proper divisors (660356044).

668277824 is a wasteful number, since it uses less digits than its factorization.

668277824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19854 (or 19844 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The square root of 668277824 is about 25851.0700745636. The cubic root of 668277824 is about 874.2836363661.

The spelling of 668277824 in words is "six hundred sixty-eight million, two hundred seventy-seven thousand, eight hundred twenty-four".