763538661 has 6 divisors (see below), whose sum is σ = 1102889190. Its totient is φ = 509025768.

The previous prime is 763538653. The next prime is 763538681. The reversal of 763538661 is 166835367.

763538661 is a `hidden beast` number, since 7 + 635 + 3 + 8 + 6 + 6 + 1 = 666.

763538661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 398002500 + 365536161 = 19950^2 + 19119^2 .

It is not a de Polignac number, because 763538661 - 2³ = 763538653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (763538621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42418806 + ... + 42418823.

It is an arithmetic number, because the mean of its divisors is an integer number (183814865).

Almost surely, 2^763538661 is an apocalyptic number.

It is an amenable number.

763538661 is a deficient number, since it is larger than the sum of its proper divisors (339350529).

763538661 is a wasteful number, since it uses less digits than its factorization.

763538661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84837635 (or 84837632 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 763538661 is about 27632.2033323439. The cubic root of 763538661 is about 913.9946998880.

The spelling of 763538661 in words is "seven hundred sixty-three million, five hundred thirty-eight thousand, six hundred sixty-one".