16663057 has 4 divisors (see below), whose sum is σ = 17540080. Its totient is φ = 15786036.

The previous prime is 16663037. The next prime is 16663091. The reversal of 16663057 is 75036661.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75036661 = 7 ⋅10719523.

It is not a de Polignac number, because 16663057 - 2²³ = 8274449 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16663037) 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, 438483 + ... + 438520.

It is an arithmetic number, because the mean of its divisors is an integer number (4385020).

Almost surely, 2^16663057 is an apocalyptic number.

It is an amenable number.

16663057 is a deficient number, since it is larger than the sum of its proper divisors (877023).

16663057 is an equidigital number, since it uses as much as digits as its factorization.

16663057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877022.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 16663057 is about 4082.0407886252. The cubic root of 16663057 is about 255.4180353223.

The spelling of 16663057 in words is "sixteen million, six hundred sixty-three thousand, fifty-seven".