668477 has 8 divisors (see below), whose sum is σ = 711360. Its totient is φ = 626400.

The previous prime is 668471. The next prime is 668509. The reversal of 668477 is 774866.

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 668477 - 2⁸ = 668221 is a prime.

It is a super-2 number, since 2×668477² = 893722999058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668477.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668477.

It is not an unprimeable number, because it can be changed into a prime (668471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2753 + ... + 2985.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2⁶⁶⁸⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

668477 is a deficient number, since it is larger than the sum of its proper divisors (42883).

668477 is a wasteful number, since it uses less digits than its factorization.

668477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its digits is 56448, while the sum is 38.

The square root of 668477 is about 817.6044275810. The cubic root of 668477 is about 87.4370485984.

The spelling of 668477 in words is "six hundred sixty-eight thousand, four hundred seventy-seven".