80708666 has 4 divisors (see below), whose sum is σ = 121063002. Its totient is φ = 40354332.

The previous prime is 80708657. The next prime is 80708689. The reversal of 80708666 is 66680708.

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

It can be written as a sum of positive squares in only one way, i.e., 74563225 + 6145441 = 8635^2 + 2479^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177165 + ... + 20177168.

Almost surely, 2^80708666 is an apocalyptic number.

80708666 is a deficient number, since it is larger than the sum of its proper divisors (40354336).

80708666 is a wasteful number, since it uses less digits than its factorization.

80708666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40354335.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 80708666 is about 8983.8001981344. The cubic root of 80708666 is about 432.1555117132.

The spelling of 80708666 in words is "eighty million, seven hundred eight thousand, six hundred sixty-six".