78660620 has 24 divisors (see below), whose sum is σ = 165400704. Its totient is φ = 31423616.

The previous prime is 78660619. The next prime is 78660623. The reversal of 78660620 is 2606687.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16997 + ... + 21123.

It is an arithmetic number, because the mean of its divisors is an integer number (6891696).

Almost surely, 2^78660620 is an apocalyptic number.

It is an amenable number.

78660620 is an abundant number, since it is smaller than the sum of its proper divisors (86740084).

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

78660620 is a wasteful number, since it uses less digits than its factorization.

78660620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089 (or 5087 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 78660620 is about 8869.0822524092. The cubic root of 78660620 is about 428.4687196201.

The spelling of 78660620 in words is "seventy-eight million, six hundred sixty thousand, six hundred twenty".