99644666 has 16 divisors (see below), whose sum is σ = 165354048. Its totient is φ = 44654400.

The previous prime is 99644647. The next prime is 99644707. The reversal of 99644666 is 66644699.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30335 + ... + 33458.

It is an arithmetic number, because the mean of its divisors is an integer number (10334628).

Almost surely, 2^99644666 is an apocalyptic number.

99644666 is a deficient number, since it is larger than the sum of its proper divisors (65709382).

99644666 is a wasteful number, since it uses less digits than its factorization.

99644666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63877.

The product of its digits is 1679616, while the sum is 50.

The square root of 99644666 is about 9982.2174891153. The cubic root of 99644666 is about 463.6084594556.

The spelling of 99644666 in words is "ninety-nine million, six hundred forty-four thousand, six hundred sixty-six".