78866827 has 4 divisors (see below), whose sum is σ = 84933520. Its totient is φ = 72800136.

The previous prime is 78866813. The next prime is 78866833. The reversal of 78866827 is 72866887.

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 78866827 - 2⁷ = 78866699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78866857) 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, 3033327 + ... + 3033352.

It is an arithmetic number, because the mean of its divisors is an integer number (21233380).

Almost surely, 2^78866827 is an apocalyptic number.

78866827 is a deficient number, since it is larger than the sum of its proper divisors (6066693).

78866827 is a wasteful number, since it uses less digits than its factorization.

78866827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066692.

The product of its digits is 1806336, while the sum is 52.

The square root of 78866827 is about 8880.6996909027. The cubic root of 78866827 is about 428.8427998828.

The spelling of 78866827 in words is "seventy-eight million, eight hundred sixty-six thousand, eight hundred twenty-seven".