666773376707 has 16 divisors (see below), whose sum is σ = 679944015360. Its totient is φ = 653666426400.

The previous prime is 666773376667. The next prime is 666773376713. The reversal of 666773376707 is 707673377666.

It is a cyclic number.

It is not a de Polignac number, because 666773376707 - 2¹⁸ = 666773114563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666773376727) 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, 80885528 + ... + 80893770.

It is an arithmetic number, because the mean of its divisors is an integer number (42496500960).

Almost surely, 2^666773376707 is an apocalyptic number.

666773376707 is a deficient number, since it is larger than the sum of its proper divisors (13170638653).

666773376707 is a wasteful number, since it uses less digits than its factorization.

666773376707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11914.

The product of its (nonzero) digits is 196036848, while the sum is 65.

The spelling of 666773376707 in words is "six hundred sixty-six billion, seven hundred seventy-three million, three hundred seventy-six thousand, seven hundred seven".