660537517673 has 8 divisors (see below), whose sum is σ = 732799712160. Its totient is φ = 590310878080.

The previous prime is 660537517621. The next prime is 660537517681. The reversal of 660537517673 is 376715735066.

660537517673 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 not a de Polignac number, because 660537517673 - 2⁶ = 660537517609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660537517603) 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, 508888040 + ... + 508889337.

It is an arithmetic number, because the mean of its divisors is an integer number (91599964020).

Almost surely, 2^660537517673 is an apocalyptic number.

It is an amenable number.

660537517673 is a deficient number, since it is larger than the sum of its proper divisors (72262194487).

660537517673 is a wasteful number, since it uses less digits than its factorization.

660537517673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017777447.

The product of its (nonzero) digits is 16669800, while the sum is 56.

The spelling of 660537517673 in words is "six hundred sixty billion, five hundred thirty-seven million, five hundred seventeen thousand, six hundred seventy-three".