16520666 has 8 divisors (see below), whose sum is σ = 24805440. Its totient is φ = 8252188.

The previous prime is 16520653. The next prime is 16520681. The reversal of 16520666 is 66602561.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1106 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (3100680).

Almost surely, 2^16520666 is an apocalyptic number.

16520666 is a deficient number, since it is larger than the sum of its proper divisors (8284774).

16520666 is a wasteful number, since it uses less digits than its factorization.

16520666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 16520666 is about 4064.5622150485. The cubic root of 16520666 is about 254.6884109092.

The spelling of 16520666 in words is "sixteen million, five hundred twenty thousand, six hundred sixty-six".