666765167086 has 16 divisors (see below), whose sum is σ = 1000970067888. Its totient is φ = 333108547200.

The previous prime is 666765167083. The next prime is 666765167113. The reversal of 666765167086 is 680761567666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666765167083) 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, 28049446 + ... + 28073206.

It is an arithmetic number, because the mean of its divisors is an integer number (62560629243).

Almost surely, 2^666765167086 is an apocalyptic number.

666765167086 is a deficient number, since it is larger than the sum of its proper divisors (334204900802).

666765167086 is a wasteful number, since it uses less digits than its factorization.

666765167086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34707.

The product of its (nonzero) digits is 91445760, while the sum is 64.

The spelling of 666765167086 in words is "six hundred sixty-six billion, seven hundred sixty-five million, one hundred sixty-seven thousand, eighty-six".