90766957687 has 16 divisors (see below), whose sum is σ = 107267590144. Its totient is φ = 75158604000.

The previous prime is 90766957679. The next prime is 90766957691. The reversal of 90766957687 is 78675966709.

It is a cyclic number.

It is not a de Polignac number, because 90766957687 - 2³ = 90766957679 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 (90766957627) 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, 242364 + ... + 490177.

It is an arithmetic number, because the mean of its divisors is an integer number (6704224384).

Almost surely, 2^90766957687 is an apocalyptic number.

90766957687 is a deficient number, since it is larger than the sum of its proper divisors (16500632457).

90766957687 is a wasteful number, since it uses less digits than its factorization.

90766957687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733150.

The product of its (nonzero) digits is 240045120, while the sum is 70.

The spelling of 90766957687 in words is "ninety billion, seven hundred sixty-six million, nine hundred fifty-seven thousand, six hundred eighty-seven".