16695666 has 64 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 4831488.

The previous prime is 16695659. The next prime is 16695671. The reversal of 16695666 is 66659661.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (349920) is a multiple of the sum of its prime factors (1440).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11235 + ... + 12633.

It is an arithmetic number, because the mean of its divisors is an integer number (661500).

Almost surely, 2^16695666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16695666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21168000).

16695666 is an abundant number, since it is smaller than the sum of its proper divisors (25640334).

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

16695666 is a wasteful number, since it uses less digits than its factorization.

16695666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1434 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 16695666 is about 4086.0330395140. The cubic root of 16695666 is about 255.5845413737.

The spelling of 16695666 in words is "sixteen million, six hundred ninety-five thousand, six hundred sixty-six".