16670656 has 28 divisors (see below), whose sum is σ = 33421320. Its totient is φ = 8249600.

The previous prime is 16670639. The next prime is 16670663. The reversal of 16670656 is 65607661.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 5175 + ... + 7753.

Almost surely, 2^16670656 is an apocalyptic number.

16670656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16670656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16710660).

16670656 is an abundant number, since it is smaller than the sum of its proper divisors (16750664).

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

16670656 is a wasteful number, since it uses less digits than its factorization.

16670656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 16670656 is about 4082.9714669588. The cubic root of 16670656 is about 255.4568562637.

The spelling of 16670656 in words is "sixteen million, six hundred seventy thousand, six hundred fifty-six".