668031479 has 8 divisors (see below), whose sum is σ = 677457312. Its totient is φ = 658667520.

The previous prime is 668031457. The next prime is 668031577. The reversal of 668031479 is 974130866.

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 668031479 - 2⁸ = 668031223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668031379) 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 7 ways as a sum of consecutive naturals, for example, 6494 + ... + 37124.

It is an arithmetic number, because the mean of its divisors is an integer number (84682164).

Almost surely, 2^668031479 is an apocalyptic number.

668031479 is a deficient number, since it is larger than the sum of its proper divisors (9425833).

668031479 is a wasteful number, since it uses less digits than its factorization.

668031479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30937.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 668031479 is about 25846.3049390043. The cubic root of 668031479 is about 874.1761950872.

The spelling of 668031479 in words is "six hundred sixty-eight million, thirty-one thousand, four hundred seventy-nine".