666740740737 has 8 divisors (see below), whose sum is σ = 888991755904. Its totient is φ = 444491776368.

The previous prime is 666740740723. The next prime is 666740740753. The reversal of 666740740737 is 737047047666.

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

It is not a de Polignac number, because 666740740737 - 2²⁰ = 666739692161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666740940737) 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, 576408 + ... + 1290630.

It is an arithmetic number, because the mean of its divisors is an integer number (111123969488).

Almost surely, 2^666740740737 is an apocalyptic number.

It is an amenable number.

666740740737 is a deficient number, since it is larger than the sum of its proper divisors (222251015167).

666740740737 is a wasteful number, since it uses less digits than its factorization.

666740740737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025399.

The product of its (nonzero) digits is 24893568, while the sum is 57.

The spelling of 666740740737 in words is "six hundred sixty-six billion, seven hundred forty million, seven hundred forty thousand, seven hundred thirty-seven".