664041236 has 12 divisors (see below), whose sum is σ = 1162256340. Its totient is φ = 331968000.

The previous prime is 664041229. The next prime is 664041263. The reversal of 664041236 is 632140466.

664041236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 92544400 + 571496836 = 9620^2 + 23906^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 34100 + ... + 49908.

It is an arithmetic number, because the mean of its divisors is an integer number (96854695).

Almost surely, 2^664041236 is an apocalyptic number.

It is an amenable number.

664041236 is a deficient number, since it is larger than the sum of its proper divisors (498215104).

664041236 is a wasteful number, since it uses less digits than its factorization.

664041236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26314 (or 26312 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 664041236 is about 25768.9975746050. The cubic root of 664041236 is about 872.4321935904.

The spelling of 664041236 in words is "six hundred sixty-four million, forty-one thousand, two hundred thirty-six".