99866664 has 24 divisors (see below), whose sum is σ = 270472410. Its totient is φ = 33288864.

The previous prime is 99866659. The next prime is 99866707. The reversal of 99866664 is 46666899.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 99800100 + 66564 = 9990^2 + 258^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99866664.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 693447 + ... + 693590.

Almost surely, 2^99866664 is an apocalyptic number.

It is an amenable number.

99866664 is an abundant number, since it is smaller than the sum of its proper divisors (170605746).

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

99866664 is a wasteful number, since it uses less digits than its factorization.

99866664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387049 (or 1387042 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 99866664 is about 9993.3309762061. The cubic root of 99866664 is about 463.9524946410.

The spelling of 99866664 in words is "ninety-nine million, eight hundred sixty-six thousand, six hundred sixty-four".