664560744212 has 48 divisors (see below), whose sum is σ = 1170753205440. Its totient is φ = 330070422528.

The previous prime is 664560744103. The next prime is 664560744233. The reversal of 664560744212 is 212447065466.

It is a happy number.

664560744212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656031818 + ... + 656032830.

It is an arithmetic number, because the mean of its divisors is an integer number (24390691780).

Almost surely, 2^664560744212 is an apocalyptic number.

It is an amenable number.

664560744212 is a deficient number, since it is larger than the sum of its proper divisors (506192461228).

664560744212 is a wasteful number, since it uses less digits than its factorization.

664560744212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 47.

The spelling of 664560744212 in words is "six hundred sixty-four billion, five hundred sixty million, seven hundred forty-four thousand, two hundred twelve".