16806666 has 8 divisors (see below), whose sum is σ = 33613344. Its totient is φ = 5602220.

The previous prime is 16806653. The next prime is 16806667. The reversal of 16806666 is 66660861.

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

16806666 is an admirable number.

16806666 is a modest number, since divided by 6666 gives 1680 as remainder.

It is not an unprimeable number, because it can be changed into a prime (16806667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400550 + ... + 1400561.

It is an arithmetic number, because the mean of its divisors is an integer number (4201668).

Almost surely, 2^16806666 is an apocalyptic number.

16806666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16806666 is a wasteful number, since it uses less digits than its factorization.

16806666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801116.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 16806666 is about 4099.5933944722. The cubic root of 16806666 is about 256.1497028861.

The spelling of 16806666 in words is "sixteen million, eight hundred six thousand, six hundred sixty-six".