664860850744 has 32 divisors (see below), whose sum is σ = 1262780640000. Its totient is φ = 328121924832.

The previous prime is 664860850741. The next prime is 664860850747. The reversal of 664860850744 is 447058068466.

It is an interprime number because it is at equal distance from previous prime (664860850741) and next prime (664860850747).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664860850741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1925527 + ... + 2244409.

It is an arithmetic number, because the mean of its divisors is an integer number (39461895000).

Almost surely, 2^664860850744 is an apocalyptic number.

It is an amenable number.

664860850744 is a deficient number, since it is larger than the sum of its proper divisors (597919789256).

664860850744 is a wasteful number, since it uses less digits than its factorization.

664860850744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322267 (or 322263 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 58.

The spelling of 664860850744 in words is "six hundred sixty-four billion, eight hundred sixty million, eight hundred fifty thousand, seven hundred forty-four".