16664528 has 20 divisors (see below), whose sum is σ = 32359908. Its totient is φ = 8313600.

The previous prime is 16664519. The next prime is 16664551. The reversal of 16664528 is 82546661.

It can be written as a sum of positive squares in 2 ways, for example, as 10942864 + 5721664 = 3308^2 + 2392^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16664491 and 16664500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8750 + ... + 10482.

Almost surely, 2^16664528 is an apocalyptic number.

It is an amenable number.

16664528 is a deficient number, since it is larger than the sum of its proper divisors (15695380).

16664528 is a wasteful number, since it uses less digits than its factorization.

16664528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342 (or 2336 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 16664528 is about 4082.2209641321. The cubic root of 16664528 is about 255.4255511276.

The spelling of 16664528 in words is "sixteen million, six hundred sixty-four thousand, five hundred twenty-eight".