64676331 has 18 divisors (see below), whose sum is σ = 95277780. Its totient is φ = 42265296.

The previous prime is 64676329. The next prime is 64676357. The reversal of 64676331 is 13367646.

It is a happy number.

64676331 is a `hidden beast` number, since 646 + 7 + 6 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 64676331 - 2¹ = 64676329 is a prime.

It is a super-2 number, since 2×64676331² = 8366055583243122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64676831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 185145 + ... + 185493.

It is an arithmetic number, because the mean of its divisors is an integer number (5293210).

Almost surely, 2^64676331 is an apocalyptic number.

64676331 is a deficient number, since it is larger than the sum of its proper divisors (30601449).

64676331 is an equidigital number, since it uses as much as digits as its factorization.

64676331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 411 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 64676331 is about 8042.1595980184. The cubic root of 64676331 is about 401.4040884886.

The spelling of 64676331 in words is "sixty-four million, six hundred seventy-six thousand, three hundred thirty-one".