660026644664 has 16 divisors (see below), whose sum is σ = 1302684167400. Its totient is φ = 312644200032.

The previous prime is 660026644661. The next prime is 660026644687. The reversal of 660026644664 is 466446620066.

660026644664 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 not an unprimeable number, because it can be changed into a prime (660026644661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2171140127 + ... + 2171140430.

Almost surely, 2^660026644664 is an apocalyptic number.

It is an amenable number.

660026644664 is a deficient number, since it is larger than the sum of its proper divisors (642657522736).

660026644664 is a wasteful number, since it uses less digits than its factorization.

660026644664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342280582 (or 4342280578 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 50.

The spelling of 660026644664 in words is "six hundred sixty billion, twenty-six million, six hundred forty-four thousand, six hundred sixty-four".