660121715607 has 8 divisors (see below), whose sum is σ = 882167214720. Its totient is φ = 439078680120.

The previous prime is 660121715599. The next prime is 660121715623. The reversal of 660121715607 is 706517121066.

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

It is not a de Polignac number, because 660121715607 - 2³ = 660121715599 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660101715607) 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, 250614369 + ... + 250617002.

It is an arithmetic number, because the mean of its divisors is an integer number (110270901840).

Almost surely, 2^660121715607 is an apocalyptic number.

660121715607 is a deficient number, since it is larger than the sum of its proper divisors (222045499113).

660121715607 is a wasteful number, since it uses less digits than its factorization.

660121715607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501231813.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 660121715607 in words is "six hundred sixty billion, one hundred twenty-one million, seven hundred fifteen thousand, six hundred seven".