78660624 has 80 divisors (see below), whose sum is σ = 233631872. Its totient is φ = 22339584.

The previous prime is 78660623. The next prime is 78660641. The reversal of 78660624 is 42606687.

It is not an unprimeable number, because it can be changed into a prime (78660623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64242 + ... + 65454.

Almost surely, 2^78660624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78660624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116815936).

78660624 is an abundant number, since it is smaller than the sum of its proper divisors (154971248).

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

78660624 is a wasteful number, since it uses less digits than its factorization.

78660624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 78660624 is about 8869.0824779117. The cubic root of 78660624 is about 428.4687268829.

The spelling of 78660624 in words is "seventy-eight million, six hundred sixty thousand, six hundred twenty-four".