79616666 has 4 divisors (see below), whose sum is σ = 119425002. Its totient is φ = 39808332.

The previous prime is 79616633. The next prime is 79616683. The reversal of 79616666 is 66661697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66661697 = 269 ⋅247813.

It can be written as a sum of positive squares in only one way, i.e., 60388441 + 19228225 = 7771^2 + 4385^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 79616666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19904165 + ... + 19904168.

Almost surely, 2^79616666 is an apocalyptic number.

79616666 is a deficient number, since it is larger than the sum of its proper divisors (39808336).

79616666 is a wasteful number, since it uses less digits than its factorization.

79616666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39808335.

The product of its digits is 489888, while the sum is 47.

The square root of 79616666 is about 8922.8171560332. The cubic root of 79616666 is about 430.1976124336.

The spelling of 79616666 in words is "seventy-nine million, six hundred sixteen thousand, six hundred sixty-six".