78664107 has 4 divisors (see below), whose sum is σ = 104885480. Its totient is φ = 52442736.

The previous prime is 78664093. The next prime is 78664111. The reversal of 78664107 is 70146687.

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

It is not a de Polignac number, because 78664107 - 2⁶ = 78664043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78664147) 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, 13110682 + ... + 13110687.

It is an arithmetic number, because the mean of its divisors is an integer number (26221370).

Almost surely, 2^78664107 is an apocalyptic number.

78664107 is a deficient number, since it is larger than the sum of its proper divisors (26221373).

78664107 is a wasteful number, since it uses less digits than its factorization.

78664107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26221372.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 78664107 is about 8869.2788320133. The cubic root of 78664107 is about 428.4750508201.

The spelling of 78664107 in words is "seventy-eight million, six hundred sixty-four thousand, one hundred seven".