766666604737701 has 12 divisors (see below), whose sum is σ = 1110254123404140. Its totient is φ = 509797159617600.

The previous prime is 766666604737679. The next prime is 766666604737823. The reversal of 766666604737701 is 107737406666667.

It can be written as a sum of positive squares in 2 ways, for example, as 510340901207076 + 256325703530625 = 22590726^2 + 16010175^2 .

It is not a de Polignac number, because 766666604737701 - 2¹¹ = 766666604735653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766666604737701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766666604730701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109492513600 + ... + 109492520601.

It is an arithmetic number, because the mean of its divisors is an integer number (92521176950345).

Almost surely, 2^{766666604737701} is an apocalyptic number.

It is an amenable number.

766666604737701 is a deficient number, since it is larger than the sum of its proper divisors (343587518666439).

766666604737701 is a wasteful number, since it uses less digits than its factorization.

766666604737701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218985034596 (or 218985034593 counting only the distinct ones).

The product of its (nonzero) digits is 1344252672, while the sum is 72.

The spelling of 766666604737701 in words is "seven hundred sixty-six trillion, six hundred sixty-six billion, six hundred four million, seven hundred thirty-seven thousand, seven hundred one".