99865666 has 8 divisors (see below), whose sum is σ = 150696000. Its totient is φ = 49633668.

The previous prime is 99865657. The next prime is 99865673. The reversal of 99865666 is 66656899.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149166 + ... + 149833.

It is an arithmetic number, because the mean of its divisors is an integer number (18837000).

Almost surely, 2^99865666 is an apocalyptic number.

99865666 is a deficient number, since it is larger than the sum of its proper divisors (50830334).

99865666 is a wasteful number, since it uses less digits than its factorization.

99865666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299168.

The product of its digits is 4199040, while the sum is 55.

The square root of 99865666 is about 9993.2810427807. The cubic root of 99865666 is about 463.9509491599.

The spelling of 99865666 in words is "ninety-nine million, eight hundred sixty-five thousand, six hundred sixty-six".