766810804 has 24 divisors (see below), whose sum is σ = 1349548200. Its totient is φ = 381233280.

The previous prime is 766810801. The next prime is 766810817. The reversal of 766810804 is 408018667.

It can be written as a sum of positive squares in 4 ways, for example, as 16160400 + 750650404 = 4020^2 + 27398^2 .

It is a super-2 number, since 2×766810804² = 1175997618262252832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766810801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716782 + ... + 717850.

It is an arithmetic number, because the mean of its divisors is an integer number (56231175).

Almost surely, 2^766810804 is an apocalyptic number.

It is an amenable number.

766810804 is a deficient number, since it is larger than the sum of its proper divisors (582737396).

766810804 is a wasteful number, since it uses less digits than its factorization.

766810804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923 (or 1921 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 766810804 is about 27691.3489017780. The cubic root of 766810804 is about 915.2984798673.

The spelling of 766810804 in words is "seven hundred sixty-six million, eight hundred ten thousand, eight hundred four".