16660741 has 4 divisors (see below), whose sum is σ = 16668972. Its totient is φ = 16652512.

The previous prime is 16660729. The next prime is 16660751. The reversal of 16660741 is 14706661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4730625 + 11930116 = 2175^2 + 3454^2 .

It is a cyclic number.

It is not a de Polignac number, because 16660741 - 2⁷ = 16660613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660751) by changing a digit.

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, 1275 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (4167243).

Almost surely, 2^16660741 is an apocalyptic number.

It is an amenable number.

16660741 is a deficient number, since it is larger than the sum of its proper divisors (8231).

16660741 is an equidigital number, since it uses as much as digits as its factorization.

16660741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 16660741 is about 4081.7570971335. The cubic root of 16660741 is about 255.4062012477.

The spelling of 16660741 in words is "sixteen million, six hundred sixty thousand, seven hundred forty-one".