78664995 has 24 divisors (see below), whose sum is σ = 138668400. Its totient is φ = 41242176.

The previous prime is 78664979. The next prime is 78665029. The reversal of 78664995 is 59946687.

It is not a de Polignac number, because 78664995 - 2⁴ = 78664979 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12160 + ... + 17469.

It is an arithmetic number, because the mean of its divisors is an integer number (5777850).

Almost surely, 2^78664995 is an apocalyptic number.

78664995 is a deficient number, since it is larger than the sum of its proper divisors (60003405).

78664995 is a wasteful number, since it uses less digits than its factorization.

78664995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29699 (or 29696 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 78664995 is about 8869.3288923120. The cubic root of 78664995 is about 428.4766630947.

The spelling of 78664995 in words is "seventy-eight million, six hundred sixty-four thousand, nine hundred ninety-five".