78966799 has 2 divisors, whose sum is σ = 78966800. Its totient is φ = 78966798.

The previous prime is 78966743. The next prime is 78966821. The reversal of 78966799 is 99766987.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78966799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78966709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39483399 + 39483400.

It is an arithmetic number, because the mean of its divisors is an integer number (39483400).

Almost surely, 2^78966799 is an apocalyptic number.

78966799 is a deficient number, since it is larger than the sum of its proper divisors (1).

78966799 is an equidigital number, since it uses as much as digits as its factorization.

78966799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10287648, while the sum is 61.

The square root of 78966799 is about 8886.3265188716. The cubic root of 78966799 is about 429.0239244939.

The spelling of 78966799 in words is "seventy-eight million, nine hundred sixty-six thousand, seven hundred ninety-nine".