668451262 has 4 divisors (see below), whose sum is σ = 1002676896. Its totient is φ = 334225630.

The previous prime is 668451257. The next prime is 668451263. The reversal of 668451262 is 262154866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 262154866 = 2 ⋅131077433.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668451263) 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 as a sum of consecutive naturals, namely, 167112814 + ... + 167112817.

It is an arithmetic number, because the mean of its divisors is an integer number (250669224).

Almost surely, 2^668451262 is an apocalyptic number.

668451262 is a deficient number, since it is larger than the sum of its proper divisors (334225634).

668451262 is a wasteful number, since it uses less digits than its factorization.

668451262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334225633.

The product of its digits is 138240, while the sum is 40.

The square root of 668451262 is about 25854.4244182693. The cubic root of 668451262 is about 874.3592640387.

The spelling of 668451262 in words is "six hundred sixty-eight million, four hundred fifty-one thousand, two hundred sixty-two".