78866516 has 24 divisors (see below), whose sum is σ = 141051456. Its totient is φ = 38575040.

The previous prime is 78866503. The next prime is 78866521. The reversal of 78866516 is 61566887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37895 + ... + 39921.

It is an arithmetic number, because the mean of its divisors is an integer number (5877144).

Almost surely, 2^78866516 is an apocalyptic number.

It is an amenable number.

78866516 is a deficient number, since it is larger than the sum of its proper divisors (62184940).

78866516 is a wasteful number, since it uses less digits than its factorization.

78866516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239 (or 2237 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 78866516 is about 8880.6821810039. The cubic root of 78866516 is about 428.8422361888.

The spelling of 78866516 in words is "seventy-eight million, eight hundred sixty-six thousand, five hundred sixteen".