664421376134361 has 8 divisors (see below), whose sum is σ = 886306638307680. Its totient is φ = 442741849025312.

The previous prime is 664421376134293. The next prime is 664421376134363. The reversal of 664421376134361 is 163431673124466.

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 664421376134361 - 2¹⁰ = 664421376133337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664421376134363) 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, 51433758531 + ... + 51433771448.

It is an arithmetic number, because the mean of its divisors is an integer number (110788329788460).

Almost surely, 2^{664421376134361} is an apocalyptic number.

It is an amenable number.

664421376134361 is a deficient number, since it is larger than the sum of its proper divisors (221885262173319).

664421376134361 is a wasteful number, since it uses less digits than its factorization.

664421376134361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102867532135.

The product of its digits is 31352832, while the sum is 57.

The spelling of 664421376134361 in words is "six hundred sixty-four trillion, four hundred twenty-one billion, three hundred seventy-six million, one hundred thirty-four thousand, three hundred sixty-one".