78675916 has 24 divisors (see below), whose sum is σ = 156731904. Its totient is φ = 34206480.

The previous prime is 78675899. The next prime is 78675917. The reversal of 78675916 is 61957687.

It is a self number, because there is not a number n which added to its sum of digits gives 78675916.

It is not an unprimeable number, because it can be changed into a prime (78675917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37860 + ... + 39883.

It is an arithmetic number, because the mean of its divisors is an integer number (6530496).

Almost surely, 2^78675916 is an apocalyptic number.

It is an amenable number.

78675916 is a deficient number, since it is larger than the sum of its proper divisors (78055988).

78675916 is a wasteful number, since it uses less digits than its factorization.

78675916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77781 (or 77779 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 78675916 is about 8869.9445319573. The cubic root of 78675916 is about 428.4964905377.

The spelling of 78675916 in words is "seventy-eight million, six hundred seventy-five thousand, nine hundred sixteen".