16165666 has 8 divisors (see below), whose sum is σ = 26452944. Its totient is φ = 7348020.

The previous prime is 16165627. The next prime is 16165717. The reversal of 16165666 is 66656161.

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

It is a super-2 number, since 2×16165666² = 522657514447112, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 367380 + ... + 367423.

It is an arithmetic number, because the mean of its divisors is an integer number (3306618).

Almost surely, 2^16165666 is an apocalyptic number.

16165666 is a deficient number, since it is larger than the sum of its proper divisors (10287278).

16165666 is a wasteful number, since it uses less digits than its factorization.

16165666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734816.

The product of its digits is 38880, while the sum is 37.

The square root of 16165666 is about 4020.6549217758. The cubic root of 16165666 is about 252.8509174964.

The spelling of 16165666 in words is "sixteen million, one hundred sixty-five thousand, six hundred sixty-six".