766660404 has 24 divisors (see below), whose sum is σ = 1796558400. Its totient is φ = 254455744.

The previous prime is 766660351. The next prime is 766660429. The reversal of 766660404 is 404066667.

It is a super-2 number, since 2×766660404² = 1175536350122886432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134304 + ... + 139895.

It is an arithmetic number, because the mean of its divisors is an integer number (74856600).

Almost surely, 2^766660404 is an apocalyptic number.

It is an amenable number.

766660404 is an abundant number, since it is smaller than the sum of its proper divisors (1029897996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766660404 is a wasteful number, since it uses less digits than its factorization.

766660404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274439 (or 274437 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 766660404 is about 27688.6331190256. The cubic root of 766660404 is about 915.2386346435.

The spelling of 766660404 in words is "seven hundred sixty-six million, six hundred sixty thousand, four hundred four".