16665712 has 40 divisors (see below), whose sum is σ = 39077856. Its totient is φ = 6721536.

The previous prime is 16665703. The next prime is 16665713. The reversal of 16665712 is 21756661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2473 + ... + 6280.

Almost surely, 2^16665712 is an apocalyptic number.

It is an amenable number.

16665712 is an abundant number, since it is smaller than the sum of its proper divisors (22412144).

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

16665712 is a wasteful number, since it uses less digits than its factorization.

16665712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8785 (or 8779 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 16665712 is about 4082.3659806539. The cubic root of 16665712 is about 255.4316002376.

The spelling of 16665712 in words is "sixteen million, six hundred sixty-five thousand, seven hundred twelve".