766806490 has 8 divisors (see below), whose sum is σ = 1380251700. Its totient is φ = 306722592.

The previous prime is 766806479. The next prime is 766806511. The reversal of 766806490 is 94608667.

It can be written as a sum of positive squares in 2 ways, for example, as 644195161 + 122611329 = 25381^2 + 11073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×766806490² = 1175984386212240200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 766806490.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38340315 + ... + 38340334.

Almost surely, 2^766806490 is an apocalyptic number.

766806490 is a deficient number, since it is larger than the sum of its proper divisors (613445210).

766806490 is a wasteful number, since it uses less digits than its factorization.

766806490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76680656.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 766806490 is about 27691.2710073048. The cubic root of 766806490 is about 915.2967634052.

The spelling of 766806490 in words is "seven hundred sixty-six million, eight hundred six thousand, four hundred ninety".