664583268131 has 4 divisors (see below), whose sum is σ = 664897791432. Its totient is φ = 664268744832.

The previous prime is 664583268101. The next prime is 664583268133. The reversal of 664583268131 is 131862385466.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 664583268131 - 2¹⁸ = 664583005987 is a prime.

It is a super-2 number, since 2×664583268131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664583268133) 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, 157258481 + ... + 157262706.

It is an arithmetic number, because the mean of its divisors is an integer number (166224447858).

Almost surely, 2^664583268131 is an apocalyptic number.

664583268131 is a deficient number, since it is larger than the sum of its proper divisors (314523301).

664583268131 is a wasteful number, since it uses less digits than its factorization.

664583268131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314523300.

The product of its digits is 4976640, while the sum is 53.

The spelling of 664583268131 in words is "six hundred sixty-four billion, five hundred eighty-three million, two hundred sixty-eight thousand, one hundred thirty-one".