664046512 has 20 divisors (see below), whose sum is σ = 1295229600. Its totient is φ = 329793728.

The previous prime is 664046491. The next prime is 664046519. The reversal of 664046512 is 215640466.

It is a super-2 number, since 2×664046512² = 881915540198732288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664046519) 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, 136888 + ... + 141655.

It is an arithmetic number, because the mean of its divisors is an integer number (64761480).

Almost surely, 2^664046512 is an apocalyptic number.

It is an amenable number.

664046512 is a deficient number, since it is larger than the sum of its proper divisors (631183088).

664046512 is a wasteful number, since it uses less digits than its factorization.

664046512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278700 (or 278694 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 664046512 is about 25769.0999454773. The cubic root of 664046512 is about 872.4345041598.

Adding to 664046512 its reverse (215640466), we get a palindrome (879686978).

The spelling of 664046512 in words is "six hundred sixty-four million, forty-six thousand, five hundred twelve".