16665474 has 48 divisors (see below), whose sum is σ = 40494528. Its totient is φ = 4478208.

The previous prime is 16665469. The next prime is 16665497. The reversal of 16665474 is 47456661.

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 23 ways as a sum of consecutive naturals, for example, 11452 + ... + 12824.

It is an arithmetic number, because the mean of its divisors is an integer number (843636).

Almost surely, 2^16665474 is an apocalyptic number.

16665474 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 16665474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20247264).

16665474 is an abundant number, since it is smaller than the sum of its proper divisors (23829054).

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

16665474 is a wasteful number, since it uses less digits than its factorization.

16665474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419 (or 1402 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 16665474 is about 4082.3368307870. The cubic root of 16665474 is about 255.4303843077.

It can be divided in two parts, 1666 and 5474, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 16665474 in words is "sixteen million, six hundred sixty-five thousand, four hundred seventy-four".