16662541 has 4 divisors (see below), whose sum is σ = 19042912. Its totient is φ = 14282172.

The previous prime is 16662517. The next prime is 16662551. The reversal of 16662541 is 14526661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16662541 - 2⁵ = 16662509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16662551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190175 + ... + 1190188.

It is an arithmetic number, because the mean of its divisors is an integer number (4760728).

Almost surely, 2^16662541 is an apocalyptic number.

It is an amenable number.

16662541 is a deficient number, since it is larger than the sum of its proper divisors (2380371).

16662541 is an equidigital number, since it uses as much as digits as its factorization.

16662541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380370.

The product of its digits is 8640, while the sum is 31.

The square root of 16662541 is about 4081.9775844558. The cubic root of 16662541 is about 255.4153988099.

The spelling of 16662541 in words is "sixteen million, six hundred sixty-two thousand, five hundred forty-one".