78366516 has 24 divisors (see below), whose sum is σ = 183123360. Its totient is φ = 26083872.

The previous prime is 78366503. The next prime is 78366523. The reversal of 78366516 is 61566387.

It is a super-2 number, since 2×78366516² = 12282621659956512, which contains 22 as substring.

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, 4450 + ... + 13286.

It is an arithmetic number, because the mean of its divisors is an integer number (7630140).

Almost surely, 2^78366516 is an apocalyptic number.

It is an amenable number.

78366516 is an abundant number, since it is smaller than the sum of its proper divisors (104756844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78366516 is a wasteful number, since it uses less digits than its factorization.

78366516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9583 (or 9581 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 78366516 is about 8852.4864303765. The cubic root of 78366516 is about 427.9340524938.

The spelling of 78366516 in words is "seventy-eight million, three hundred sixty-six thousand, five hundred sixteen".