16165656 has 160 divisors (see below), whose sum is σ = 51836400. Its totient is φ = 4665600.

The previous prime is 16165627. The next prime is 16165717. The reversal of 16165656 is 65656161.

It is a super-2 number, since 2×16165656² = 522656867820672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 16165656.

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 160006 + ... + 160106.

Almost surely, 2^16165656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16165656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25918200).

16165656 is an abundant number, since it is smaller than the sum of its proper divisors (35670744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16165656 is a wasteful number, since it uses less digits than its factorization.

16165656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 138 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 16165656 is about 4020.6536781971. The cubic root of 16165656 is about 252.8508653590.

The spelling of 16165656 in words is "sixteen million, one hundred sixty-five thousand, six hundred fifty-six".