766651663 has 12 divisors (see below), whose sum is σ = 802845400. Its totient is φ = 732028176.

The previous prime is 766651657. The next prime is 766651741. The reversal of 766651663 is 366156667.

It is not a de Polignac number, because 766651663 - 2⁵ = 766651631 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766651643) 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, 450388 + ... + 452086.

Almost surely, 2^766651663 is an apocalyptic number.

766651663 is a deficient number, since it is larger than the sum of its proper divisors (36193737).

766651663 is a wasteful number, since it uses less digits than its factorization.

766651663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598 (or 2575 counting only the distinct ones).

The product of its digits is 816480, while the sum is 46.

The square root of 766651663 is about 27688.4752740197. The cubic root of 766651663 is about 915.2351562972.

The spelling of 766651663 in words is "seven hundred sixty-six million, six hundred fifty-one thousand, six hundred sixty-three".