16662361 has 4 divisors (see below), whose sum is σ = 16818192. Its totient is φ = 16506532.

The previous prime is 16662343. The next prime is 16662403. The reversal of 16662361 is 16326661.

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 16662361 - 2¹¹ = 16660313 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16662311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77755 + ... + 77968.

It is an arithmetic number, because the mean of its divisors is an integer number (4204548).

Almost surely, 2^16662361 is an apocalyptic number.

It is an amenable number.

16662361 is a deficient number, since it is larger than the sum of its proper divisors (155831).

16662361 is a wasteful number, since it uses less digits than its factorization.

16662361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155830.

The product of its digits is 7776, while the sum is 31.

The square root of 16662361 is about 4081.9555362596. The cubic root of 16662361 is about 255.4144790835.

The spelling of 16662361 in words is "sixteen million, six hundred sixty-two thousand, three hundred sixty-one".