16666544 has 20 divisors (see below), whose sum is σ = 32512800. Its totient is φ = 8276160.

The previous prime is 16666523. The next prime is 16666547. The reversal of 16666544 is 44566661.

It is a junction number, because it is equal to n+sod(n) for n = 16666498 and 16666507.

It is not an unprimeable number, because it can be changed into a prime (16666547) 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, 1112 + ... + 5879.

It is an arithmetic number, because the mean of its divisors is an integer number (1625640).

Almost surely, 2^16666544 is an apocalyptic number.

It is an amenable number.

16666544 is a deficient number, since it is larger than the sum of its proper divisors (15846256).

16666544 is a wasteful number, since it uses less digits than its factorization.

16666544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7148 (or 7142 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 16666544 is about 4082.4678810739. The cubic root of 16666544 is about 255.4358507922.

The spelling of 16666544 in words is "sixteen million, six hundred sixty-six thousand, five hundred forty-four".