779664897 has 48 divisors (see below), whose sum is σ = 1332676800. Its totient is φ = 433843200.

The previous prime is 779664889. The next prime is 779664917. The reversal of 779664897 is 798466977.

779664897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 779664897 - 2³ = 779664889 is a prime.

It is a super-2 number, since 2×779664897² = 1215754703228041218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (779664827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63354 + ... + 74652.

It is an arithmetic number, because the mean of its divisors is an integer number (27764100).

Almost surely, 2^779664897 is an apocalyptic number.

It is an amenable number.

779664897 is a deficient number, since it is larger than the sum of its proper divisors (553011903).

779664897 is a wasteful number, since it uses less digits than its factorization.

779664897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11374 (or 11371 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 779664897 is about 27922.4801369792. The cubic root of 779664897 is about 920.3845655187.

The spelling of 779664897 in words is "seven hundred seventy-nine million, six hundred sixty-four thousand, eight hundred ninety-seven".