660575644979 has 8 divisors (see below), whose sum is σ = 676195734528. Its totient is φ = 645020775880.

The previous prime is 660575644969. The next prime is 660575644987. The reversal of 660575644979 is 979446575066.

660575644979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660575644979 - 2⁸ = 660575644723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660575644969) 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, 16284617 + ... + 16325130.

It is an arithmetic number, because the mean of its divisors is an integer number (84524466816).

Almost surely, 2^660575644979 is an apocalyptic number.

660575644979 is a deficient number, since it is larger than the sum of its proper divisors (15620089549).

660575644979 is a wasteful number, since it uses less digits than its factorization.

660575644979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32610225.

The product of its (nonzero) digits is 342921600, while the sum is 68.

The spelling of 660575644979 in words is "six hundred sixty billion, five hundred seventy-five million, six hundred forty-four thousand, nine hundred seventy-nine".