668332801623 has 16 divisors (see below), whose sum is σ = 920003014656. Its totient is φ = 431113492320.

The previous prime is 668332801613. The next prime is 668332801663. The reversal of 668332801623 is 326108233866.

It is not a de Polignac number, because 668332801623 - 2⁶ = 668332801559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668332801613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13165 + ... + 1156217.

It is an arithmetic number, because the mean of its divisors is an integer number (57500188416).

Almost surely, 2^668332801623 is an apocalyptic number.

668332801623 is a deficient number, since it is larger than the sum of its proper divisors (251670213033).

668332801623 is a wasteful number, since it uses less digits than its factorization.

668332801623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149374.

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 668332801623 in words is "six hundred sixty-eight billion, three hundred thirty-two million, eight hundred one thousand, six hundred twenty-three".