79783966 has 4 divisors (see below), whose sum is σ = 119675952. Its totient is φ = 39891982.

The previous prime is 79783939. The next prime is 79783969. The reversal of 79783966 is 66938797.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79783969) by changing a digit.

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 as a sum of consecutive naturals, namely, 19945990 + ... + 19945993.

It is an arithmetic number, because the mean of its divisors is an integer number (29918988).

Almost surely, 2^79783966 is an apocalyptic number.

79783966 is a deficient number, since it is larger than the sum of its proper divisors (39891986).

79783966 is a wasteful number, since it uses less digits than its factorization.

79783966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39891985.

The product of its digits is 3429216, while the sum is 55.

The square root of 79783966 is about 8932.1870782021. The cubic root of 79783966 is about 430.4987290668.

The spelling of 79783966 in words is "seventy-nine million, seven hundred eighty-three thousand, nine hundred sixty-six".