666736700007 has 16 divisors (see below), whose sum is σ = 1043438646272. Its totient is φ = 370695307680.

The previous prime is 666736699991. The next prime is 666736700009. The reversal of 666736700007 is 700007637666.

It is not a de Polignac number, because 666736700007 - 2⁴ = 666736699991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666736700009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429044719 + ... + 429046272.

It is an arithmetic number, because the mean of its divisors is an integer number (65214915392).

Almost surely, 2^666736700007 is an apocalyptic number.

666736700007 is a deficient number, since it is larger than the sum of its proper divisors (376701946265).

666736700007 is a wasteful number, since it uses less digits than its factorization.

666736700007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858091038.

The product of its (nonzero) digits is 1333584, while the sum is 48.

The spelling of 666736700007 in words is "six hundred sixty-six billion, seven hundred thirty-six million, seven hundred thousand, seven".