664069924 has 12 divisors (see below), whose sum is σ = 1328139904. Its totient is φ = 284601384.

The previous prime is 664069891. The next prime is 664069951. The reversal of 664069924 is 429960466.

664069924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

664069924 is an admirable number.

It is a super-2 number, since 2×664069924² = 881977727922731552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11858364 + ... + 11858419.

Almost surely, 2^664069924 is an apocalyptic number.

It is an amenable number.

664069924 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664069924 is a wasteful number, since it uses less digits than its factorization.

664069924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23716794 (or 23716792 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 664069924 is about 25769.5542064662. The cubic root of 664069924 is about 872.4447570544. Note that the first 3 decimals are identical.

The spelling of 664069924 in words is "six hundred sixty-four million, sixty-nine thousand, nine hundred twenty-four".