668271279 has 32 divisors (see below), whose sum is σ = 1003968000. Its totient is φ = 392312448.

The previous prime is 668271257. The next prime is 668271283. The reversal of 668271279 is 972172866.

It is not a de Polignac number, because 668271279 - 2⁷ = 668271151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668271209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446857 + ... + 448349.

It is an arithmetic number, because the mean of its divisors is an integer number (31374000).

Almost surely, 2^668271279 is an apocalyptic number.

668271279 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

668271279 is a deficient number, since it is larger than the sum of its proper divisors (335696721).

668271279 is a wasteful number, since it uses less digits than its factorization.

668271279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its digits is 508032, while the sum is 48.

The square root of 668271279 is about 25850.9434837493. The cubic root of 668271279 is about 874.2807821614.

The spelling of 668271279 in words is "six hundred sixty-eight million, two hundred seventy-one thousand, two hundred seventy-nine".