668316201663 has 16 divisors (see below), whose sum is σ = 972238265856. Its totient is φ = 404980967040.

The previous prime is 668316201649. The next prime is 668316201667. The reversal of 668316201663 is 366102613866.

It is not a de Polignac number, because 668316201663 - 2³⁰ = 667242459839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668316201667) 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, 1248970 + ... + 1701927.

It is an arithmetic number, because the mean of its divisors is an integer number (60764891616).

Almost surely, 2^668316201663 is an apocalyptic number.

668316201663 is a deficient number, since it is larger than the sum of its proper divisors (303922064193).

668316201663 is a wasteful number, since it uses less digits than its factorization.

668316201663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957774.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 668316201663 in words is "six hundred sixty-eight billion, three hundred sixteen million, two hundred one thousand, six hundred sixty-three".