79415666 has 8 divisors (see below), whose sum is σ = 129952944. Its totient is φ = 36098020.

The previous prime is 79415657. The next prime is 79415669. The reversal of 79415666 is 66651497.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79415669) 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, 1804880 + ... + 1804923.

It is an arithmetic number, because the mean of its divisors is an integer number (16244118).

Almost surely, 2^79415666 is an apocalyptic number.

79415666 is a deficient number, since it is larger than the sum of its proper divisors (50537278).

79415666 is a wasteful number, since it uses less digits than its factorization.

79415666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609816.

The product of its digits is 272160, while the sum is 44.

The square root of 79415666 is about 8911.5467793195. The cubic root of 79415666 is about 429.8352821421.

The spelling of 79415666 in words is "seventy-nine million, four hundred fifteen thousand, six hundred sixty-six".