664343113 has 32 divisors (see below), whose sum is σ = 829440000. Its totient is φ = 519255360.

The previous prime is 664343111. The next prime is 664343137. The reversal of 664343113 is 311343466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 664343113 - 2¹ = 664343111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664343111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1108788 + ... + 1109386.

It is an arithmetic number, because the mean of its divisors is an integer number (25920000).

Almost surely, 2^664343113 is an apocalyptic number.

It is an amenable number.

664343113 is a deficient number, since it is larger than the sum of its proper divisors (165096887).

664343113 is a wasteful number, since it uses less digits than its factorization.

664343113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925.

The product of its digits is 15552, while the sum is 31.

The square root of 664343113 is about 25774.8542769886. The cubic root of 664343113 is about 872.5643778082.

Adding to 664343113 its reverse (311343466), we get a palindrome (975686579).

The spelling of 664343113 in words is "six hundred sixty-four million, three hundred forty-three thousand, one hundred thirteen".