668457514 has 8 divisors (see below), whose sum is σ = 1006588548. Its totient is φ = 332928000.

The previous prime is 668457467. The next prime is 668457523. The reversal of 668457514 is 415754866.

It can be written as a sum of positive squares in 2 ways, for example, as 636704289 + 31753225 = 25233^2 + 5635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649737 + ... + 650764.

Almost surely, 2^668457514 is an apocalyptic number.

668457514 is a deficient number, since it is larger than the sum of its proper divisors (338131034).

668457514 is a wasteful number, since it uses less digits than its factorization.

668457514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300760.

The product of its digits is 806400, while the sum is 46.

The square root of 668457514 is about 25854.5453257256. The cubic root of 668457514 is about 874.3619899801.

The spelling of 668457514 in words is "six hundred sixty-eight million, four hundred fifty-seven thousand, five hundred fourteen".