78942966 has 16 divisors (see below), whose sum is σ = 158006784. Its totient is φ = 26294184.

The previous prime is 78942961. The next prime is 78942971. The reversal of 78942966 is 66924987.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78942961) and next prime (78942971).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78942961) 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, 4995 + ... + 13521.

It is an arithmetic number, because the mean of its divisors is an integer number (9875424).

Almost surely, 2^78942966 is an apocalyptic number.

78942966 is an abundant number, since it is smaller than the sum of its proper divisors (79063818).

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

78942966 is a wasteful number, since it uses less digits than its factorization.

78942966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075.

The product of its digits is 1306368, while the sum is 51.

The square root of 78942966 is about 8884.9854248614. The cubic root of 78942966 is about 428.9807588590.

The spelling of 78942966 in words is "seventy-eight million, nine hundred forty-two thousand, nine hundred sixty-six".