668079 has 6 divisors (see below), whose sum is σ = 965016. Its totient is φ = 445380.

The previous prime is 668069. The next prime is 668089. The reversal of 668079 is 970866.

It is an interprime number because it is at equal distance from previous prime (668069) and next prime (668089).

It is not a de Polignac number, because 668079 - 2⁵ = 668047 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668009) 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 5 ways as a sum of consecutive naturals, for example, 37107 + ... + 37124.

It is an arithmetic number, because the mean of its divisors is an integer number (160836).

2⁶⁶⁸⁰⁷⁹ is an apocalyptic number.

668079 is a deficient number, since it is larger than the sum of its proper divisors (296937).

668079 is a wasteful number, since it uses less digits than its factorization.

668079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74237 (or 74234 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 668079 is about 817.3609973567. The cubic root of 668079 is about 87.4196923024.

The spelling of 668079 in words is "six hundred sixty-eight thousand, seventy-nine".