668082530 has 8 divisors (see below), whose sum is σ = 1202548572. Its totient is φ = 267233008.

The previous prime is 668082517. The next prime is 668082557. The reversal of 668082530 is 35280866.

It can be written as a sum of positive squares in 2 ways, for example, as 666310969 + 1771561 = 25813^2 + 1331^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33404117 + ... + 33404136.

Almost surely, 2^668082530 is an apocalyptic number.

668082530 is a deficient number, since it is larger than the sum of its proper divisors (534466042).

668082530 is a wasteful number, since it uses less digits than its factorization.

668082530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66808260.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 668082530 is about 25847.2925081139. The cubic root of 668082530 is about 874.1984627166.

The spelling of 668082530 in words is "six hundred sixty-eight million, eighty-two thousand, five hundred thirty".