16663374 has 64 divisors (see below), whose sum is σ = 45588480. Its totient is φ = 4393440.

The previous prime is 16663351. The next prime is 16663393. The reversal of 16663374 is 47336661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3219 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (712320).

Almost surely, 2^16663374 is an apocalyptic number.

16663374 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16663374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22794240).

16663374 is an abundant number, since it is smaller than the sum of its proper divisors (28925106).

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

16663374 is a wasteful number, since it uses less digits than its factorization.

16663374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422 (or 3416 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 16663374 is about 4082.0796170580. The cubic root of 16663374 is about 255.4196550132.

The spelling of 16663374 in words is "sixteen million, six hundred sixty-three thousand, three hundred seventy-four".