668252465 has 32 divisors (see below), whose sum is σ = 860910336. Its totient is φ = 496742400.

The previous prime is 668252441. The next prime is 668252479. The reversal of 668252465 is 564252866.

It is not a de Polignac number, because 668252465 - 2⁸ = 668252209 is a prime.

It is a super-2 number, since 2×668252465² = 893122713957152450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1666265 + ... + 1666665.

It is an arithmetic number, because the mean of its divisors is an integer number (26903448).

Almost surely, 2^668252465 is an apocalyptic number.

It is an amenable number.

668252465 is a deficient number, since it is larger than the sum of its proper divisors (192657871).

668252465 is a wasteful number, since it uses less digits than its factorization.

668252465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its digits is 691200, while the sum is 44.

The square root of 668252465 is about 25850.5795873129. The cubic root of 668252465 is about 874.2725774729.

The spelling of 668252465 in words is "six hundred sixty-eight million, two hundred fifty-two thousand, four hundred sixty-five".