668630901 has 8 divisors (see below), whose sum is σ = 892710720. Its totient is φ = 445152512.

The previous prime is 668630899. The next prime is 668630929. The reversal of 668630901 is 109036866.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 668630901 - 2¹ = 668630899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668630901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668630701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147756 + ... + 152213.

It is an arithmetic number, because the mean of its divisors is an integer number (111588840).

Almost surely, 2^668630901 is an apocalyptic number.

It is an amenable number.

668630901 is a deficient number, since it is larger than the sum of its proper divisors (224079819).

668630901 is a wasteful number, since it uses less digits than its factorization.

668630901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300715.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 668630901 is about 25857.8982324550. The cubic root of 668630901 is about 874.4375818681.

The spelling of 668630901 in words is "six hundred sixty-eight million, six hundred thirty thousand, nine hundred one".