668530355 has 16 divisors (see below), whose sum is σ = 862112160. Its totient is φ = 495846912.

The previous prime is 668530349. The next prime is 668530361. The reversal of 668530355 is 553035866.

It is an interprime number because it is at equal distance from previous prime (668530349) and next prime (668530361).

It is a cyclic number.

It is not a de Polignac number, because 668530355 - 2⁴ = 668530339 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 53000 + ... + 64389.

It is an arithmetic number, because the mean of its divisors is an integer number (53882010).

Almost surely, 2^668530355 is an apocalyptic number.

668530355 is a deficient number, since it is larger than the sum of its proper divisors (193581805).

668530355 is a wasteful number, since it uses less digits than its factorization.

668530355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117478.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 668530355 is about 25855.9539564875. The cubic root of 668530355 is about 874.3937482132.

The spelling of 668530355 in words is "six hundred sixty-eight million, five hundred thirty thousand, three hundred fifty-five".