663979032001 has 4 divisors (see below), whose sum is σ = 664634491092. Its totient is φ = 663323572912.

The previous prime is 663979031977. The next prime is 663979032019. The reversal of 663979032001 is 100230979366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35802316225 + 628176715776 = 189215^2 + 792576^2 .

It is a cyclic number.

It is not a de Polignac number, because 663979032001 - 2¹⁹ = 663978507713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663979032061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327728026 + ... + 327730051.

It is an arithmetic number, because the mean of its divisors is an integer number (166158622773).

Almost surely, 2^663979032001 is an apocalyptic number.

It is an amenable number.

663979032001 is a deficient number, since it is larger than the sum of its proper divisors (655459091).

663979032001 is a wasteful number, since it uses less digits than its factorization.

663979032001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655459090.

The product of its (nonzero) digits is 367416, while the sum is 46.

The spelling of 663979032001 in words is "six hundred sixty-three billion, nine hundred seventy-nine million, thirty-two thousand, one".