78675656 has 16 divisors (see below), whose sum is σ = 155281200. Its totient is φ = 37267344.

The previous prime is 78675647. The next prime is 78675659. The reversal of 78675656 is 65657687.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78675659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258650 + ... + 258953.

It is an arithmetic number, because the mean of its divisors is an integer number (9705075).

Almost surely, 2^78675656 is an apocalyptic number.

78675656 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78675656 is a deficient number, since it is larger than the sum of its proper divisors (76605544).

78675656 is a wasteful number, since it uses less digits than its factorization.

78675656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517628 (or 517624 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 50.

The square root of 78675656 is about 8869.9298757093. The cubic root of 78675656 is about 428.4960185202.

The spelling of 78675656 in words is "seventy-eight million, six hundred seventy-five thousand, six hundred fifty-six".