664176331 has 24 divisors (see below), whose sum is σ = 875852880. Its totient is φ = 497835072.

The previous prime is 664176329. The next prime is 664176341. The reversal of 664176331 is 133671466.

It is a happy number.

It is not a de Polignac number, because 664176331 - 2¹ = 664176329 is a prime.

It is a super-2 number, since 2×664176331² = 882260397321243122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664176301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15336 + ... + 39541.

It is an arithmetic number, because the mean of its divisors is an integer number (36493870).

Almost surely, 2^664176331 is an apocalyptic number.

664176331 is a deficient number, since it is larger than the sum of its proper divisors (211676549).

664176331 is a wasteful number, since it uses less digits than its factorization.

664176331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54923 (or 54916 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 664176331 is about 25771.6187112878. The cubic root of 664176331 is about 872.4913531873.

The spelling of 664176331 in words is "six hundred sixty-four million, one hundred seventy-six thousand, three hundred thirty-one".