16660541 has 8 divisors (see below), whose sum is σ = 16899960. Its totient is φ = 16422912.

The previous prime is 16660537. The next prime is 16660543. The reversal of 16660541 is 14506661.

It can be written as a sum of positive squares in 4 ways, for example, as 828100 + 15832441 = 910^2 + 3979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16660541 - 2² = 16660537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38261 + ... + 38693.

It is an arithmetic number, because the mean of its divisors is an integer number (2112495).

Almost surely, 2^16660541 is an apocalyptic number.

It is an amenable number.

16660541 is a deficient number, since it is larger than the sum of its proper divisors (239419).

16660541 is a wasteful number, since it uses less digits than its factorization.

16660541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16660541 is about 4081.7325978070. The cubic root of 16660541 is about 255.4051792554.

The spelling of 16660541 in words is "sixteen million, six hundred sixty thousand, five hundred forty-one".