664512442 has 16 divisors (see below), whose sum is σ = 1100488032. Its totient is φ = 298411120.

The previous prime is 664512437. The next prime is 664512451. The reversal of 664512442 is 244215466.

It is a junction number, because it is equal to n+sod(n) for n = 664512398 and 664512407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180133 + ... + 183784.

It is an arithmetic number, because the mean of its divisors is an integer number (68780502).

Almost surely, 2^664512442 is an apocalyptic number.

664512442 is a deficient number, since it is larger than the sum of its proper divisors (435975590).

664512442 is a wasteful number, since it uses less digits than its factorization.

664512442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364013.

The product of its digits is 46080, while the sum is 34.

The square root of 664512442 is about 25778.1388389465. The cubic root of 664512442 is about 872.6385051175.

The spelling of 664512442 in words is "six hundred sixty-four million, five hundred twelve thousand, four hundred forty-two".