668753501 has 16 divisors (see below), whose sum is σ = 754944960. Its totient is φ = 588228480.

The previous prime is 668753489. The next prime is 668753521. The reversal of 668753501 is 105357866.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668753501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668753521) 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 in 15 ways as a sum of consecutive naturals, for example, 8330 + ... + 37508.

It is an arithmetic number, because the mean of its divisors is an integer number (47184060).

Almost surely, 2^668753501 is an apocalyptic number.

It is an amenable number.

668753501 is a deficient number, since it is larger than the sum of its proper divisors (86191459).

668753501 is a wasteful number, since it uses less digits than its factorization.

668753501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29276.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 668753501 is about 25860.2687727719. The cubic root of 668753501 is about 874.4910241562.

The spelling of 668753501 in words is "six hundred sixty-eight million, seven hundred fifty-three thousand, five hundred one".