664357131 has 12 divisors (see below), whose sum is σ = 959874552. Its totient is φ = 442790496.

The previous prime is 664357129. The next prime is 664357147. The reversal of 664357131 is 131753466.

664357131 is a `hidden beast` number, since 6 + 643 + 5 + 7 + 1 + 3 + 1 = 666.

It is not a de Polignac number, because 664357131 - 2¹ = 664357129 is a prime.

It is a super-2 number, since 2×664357131² = 882740795021102322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664350131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41940 + ... + 55566.

It is an arithmetic number, because the mean of its divisors is an integer number (79989546).

Almost surely, 2^664357131 is an apocalyptic number.

664357131 is a deficient number, since it is larger than the sum of its proper divisors (295517421).

664357131 is a wasteful number, since it uses less digits than its factorization.

664357131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19050 (or 19047 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 664357131 is about 25775.1262072565. The cubic root of 664357131 is about 872.5705149589.

The spelling of 664357131 in words is "six hundred sixty-four million, three hundred fifty-seven thousand, one hundred thirty-one".