76998666 has 16 divisors (see below), whose sum is σ = 154486944. Its totient is φ = 25584624.

The previous prime is 76998619. The next prime is 76998673. The reversal of 76998666 is 66689967.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 18340 + ... + 22143.

It is an arithmetic number, because the mean of its divisors is an integer number (9655434).

Almost surely, 2^76998666 is an apocalyptic number.

76998666 is an abundant number, since it is smaller than the sum of its proper divisors (77488278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76998666 is a wasteful number, since it uses less digits than its factorization.

76998666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40805.

The product of its digits is 5878656, while the sum is 57.

The square root of 76998666 is about 8774.8883753584. Note that the first 3 decimals coincide. The cubic root of 76998666 is about 425.4296296731.

The spelling of 76998666 in words is "seventy-six million, nine hundred ninety-eight thousand, six hundred sixty-six".