78766827 has 4 divisors (see below), whose sum is σ = 105022440. Its totient is φ = 52511216.

The previous prime is 78766811. The next prime is 78766859. The reversal of 78766827 is 72866787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78766827 - 2⁴ = 78766811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78766827.

It is not an unprimeable number, because it can be changed into a prime (78766867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13127802 + ... + 13127807.

It is an arithmetic number, because the mean of its divisors is an integer number (26255610).

Almost surely, 2^78766827 is an apocalyptic number.

78766827 is a deficient number, since it is larger than the sum of its proper divisors (26255613).

78766827 is a wasteful number, since it uses less digits than its factorization.

78766827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26255612.

The product of its digits is 1580544, while the sum is 51.

The square root of 78766827 is about 8875.0677180515. The cubic root of 78766827 is about 428.6614713505.

The spelling of 78766827 in words is "seventy-eight million, seven hundred sixty-six thousand, eight hundred twenty-seven".