78766676 has 6 divisors (see below), whose sum is σ = 137841690. Its totient is φ = 39383336.

The previous prime is 78766663. The next prime is 78766687. The reversal of 78766676 is 67666787.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 33339076 = 6740^2 + 5774^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9845831 + ... + 9845838.

It is an arithmetic number, because the mean of its divisors is an integer number (22973615).

Almost surely, 2^78766676 is an apocalyptic number.

It is an amenable number.

78766676 is a deficient number, since it is larger than the sum of its proper divisors (59075014).

78766676 is a wasteful number, since it uses less digits than its factorization.

78766676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19691673 (or 19691671 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 53.

The square root of 78766676 is about 8875.0592110701. The cubic root of 78766676 is about 428.6611974284.

The spelling of 78766676 in words is "seventy-eight million, seven hundred sixty-six thousand, six hundred seventy-six".