78916677 has 32 divisors (see below), whose sum is σ = 124207104. Its totient is φ = 43632000.

The previous prime is 78916667. The next prime is 78916679. The reversal of 78916677 is 77661987.

It is a happy number.

It is not a de Polignac number, because 78916677 - 2⁴ = 78916661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78916679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129708 + ... + 130314.

It is an arithmetic number, because the mean of its divisors is an integer number (3881472).

Almost surely, 2^78916677 is an apocalyptic number.

It is an amenable number.

78916677 is a deficient number, since it is larger than the sum of its proper divisors (45290427).

78916677 is a wasteful number, since it uses less digits than its factorization.

78916677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its digits is 889056, while the sum is 51.

The square root of 78916677 is about 8883.5058957598. The cubic root of 78916677 is about 428.9331349105.

The spelling of 78916677 in words is "seventy-eight million, nine hundred sixteen thousand, six hundred seventy-seven".