664463621634063 has 32 divisors (see below), whose sum is σ = 938514572835840. Its totient is φ = 416719128683520.

The previous prime is 664463621634061. The next prime is 664463621634079. The reversal of 664463621634063 is 360436126364466.

It is not a de Polignac number, because 664463621634063 - 2¹ = 664463621634061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664463621633988 and 664463621634006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664463621634061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3267950443 + ... + 3268153763.

It is an arithmetic number, because the mean of its divisors is an integer number (29328580401120).

Almost surely, 2^{664463621634063} is an apocalyptic number.

664463621634063 is a deficient number, since it is larger than the sum of its proper divisors (274050951201777).

664463621634063 is a wasteful number, since it uses less digits than its factorization.

664463621634063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233647.

The product of its (nonzero) digits is 161243136, while the sum is 60.

The spelling of 664463621634063 in words is "six hundred sixty-four trillion, four hundred sixty-three billion, six hundred twenty-one million, six hundred thirty-four thousand, sixty-three".