772806668 has 12 divisors (see below), whose sum is σ = 1354666152. Its totient is φ = 385759200.

The previous prime is 772806667. The next prime is 772806731. The reversal of 772806668 is 866608277.

It is a happy number.

It is a super-2 number, since 2×772806668² = 1194460292210524448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (772806667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158330 + ... + 163137.

It is an arithmetic number, because the mean of its divisors is an integer number (112888846).

Almost surely, 2^772806668 is an apocalyptic number.

It is an amenable number.

772806668 is a deficient number, since it is larger than the sum of its proper divisors (581859484).

772806668 is a wasteful number, since it uses less digits than its factorization.

772806668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322072 (or 322070 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 772806668 is about 27799.4004971330. The cubic root of 772806668 is about 917.6779294932.

The spelling of 772806668 in words is "seven hundred seventy-two million, eight hundred six thousand, six hundred sixty-eight".