78667672 has 16 divisors (see below), whose sum is σ = 147616560. Its totient is φ = 39303264.

The previous prime is 78667651. The next prime is 78667681. The reversal of 78667672 is 27676687.

It is a congruent number.

It is an unprimeable number.

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, 10093 + ... + 16099.

It is an arithmetic number, because the mean of its divisors is an integer number (9226035).

Almost surely, 2^78667672 is an apocalyptic number.

It is an amenable number.

78667672 is a deficient number, since it is larger than the sum of its proper divisors (68948888).

78667672 is a wasteful number, since it uses less digits than its factorization.

78667672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650 (or 7646 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 49.

The square root of 78667672 is about 8869.4798043628. The cubic root of 78667672 is about 428.4815234480.

The spelling of 78667672 in words is "seventy-eight million, six hundred sixty-seven thousand, six hundred seventy-two".