23199966 has 32 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 7483320.

The previous prime is 23199959. The next prime is 23199983. The reversal of 23199966 is 66999132.

23199966 = T₇₁₆ + T₇₁₇ + ... + T₇₉₆.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256 + ... + 8603.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^23199966 is an apocalyptic number.

23199966 is an abundant number, since it is smaller than the sum of its proper divisors (30022434).

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

23199966 is a wasteful number, since it uses less digits than its factorization.

23199966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13901 (or 13895 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 23199966 is about 4816.6343020827. The cubic root of 23199966 is about 285.2084901024.

The spelling of 23199966 in words is "twenty-three million, one hundred ninety-nine thousand, nine hundred sixty-six".