666756548773 has 32 divisors (see below), whose sum is σ = 789734727936. Its totient is φ = 551149767168.

The previous prime is 666756548761. The next prime is 666756548791. The reversal of 666756548773 is 377845657666.

666756548773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666756548773 - 2⁹ = 666756548261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666756548173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6011265 + ... + 6121177.

It is an arithmetic number, because the mean of its divisors is an integer number (24679210248).

Almost surely, 2^666756548773 is an apocalyptic number.

It is an amenable number.

666756548773 is a deficient number, since it is larger than the sum of its proper divisors (122978179163).

666756548773 is a wasteful number, since it uses less digits than its factorization.

666756548773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110253.

The product of its digits is 1066867200, while the sum is 70.

The spelling of 666756548773 in words is "six hundred sixty-six billion, seven hundred fifty-six million, five hundred forty-eight thousand, seven hundred seventy-three".