16200666 has 12 divisors (see below), whose sum is σ = 35101482. Its totient is φ = 5400216.

The previous prime is 16200641. The next prime is 16200713. The reversal of 16200666 is 66600261.

It can be written as a sum of positive squares in only one way, i.e., 13905441 + 2295225 = 3729^2 + 1515^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

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, 450001 + ... + 450036.

Almost surely, 2^16200666 is an apocalyptic number.

16200666 is an abundant number, since it is smaller than the sum of its proper divisors (18900816).

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

16200666 is a wasteful number, since it uses less digits than its factorization.

16200666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900045 (or 900042 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16200666 is about 4025.0050931645. The cubic root of 16200666 is about 253.0332669884.

The spelling of 16200666 in words is "sixteen million, two hundred thousand, six hundred sixty-six".