78871966 has 8 divisors (see below), whose sum is σ = 119355264. Its totient is φ = 39086880.

The previous prime is 78871957. The next prime is 78871979. The reversal of 78871966 is 66917887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174270 + ... + 174721.

It is an arithmetic number, because the mean of its divisors is an integer number (14919408).

Almost surely, 2^78871966 is an apocalyptic number.

78871966 is a deficient number, since it is larger than the sum of its proper divisors (40483298).

78871966 is a wasteful number, since it uses less digits than its factorization.

78871966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349106.

The product of its digits is 1016064, while the sum is 52.

The square root of 78871966 is about 8880.9890214998. The cubic root of 78871966 is about 428.8521142142.

The spelling of 78871966 in words is "seventy-eight million, eight hundred seventy-one thousand, nine hundred sixty-six".