16766644 has 24 divisors (see below), whose sum is σ = 30074240. Its totient is φ = 8176896.

The previous prime is 16766627. The next prime is 16766647. The reversal of 16766644 is 44666761.

It is a happy number.

It is a super-2 number, since 2×16766644² = 562240702045472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16766597 and 16766606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16766647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30379 + ... + 30925.

Almost surely, 2^16766644 is an apocalyptic number.

It is an amenable number.

16766644 is a deficient number, since it is larger than the sum of its proper divisors (13307596).

16766644 is a wasteful number, since it uses less digits than its factorization.

16766644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 725 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 16766644 is about 4094.7092692888. The cubic root of 16766644 is about 255.9462167288.

The spelling of 16766644 in words is "sixteen million, seven hundred sixty-six thousand, six hundred forty-four".