16663087 has 6 divisors (see below), whose sum is σ = 19383648. Its totient is φ = 14282604.

The previous prime is 16663037. The next prime is 16663091. The reversal of 16663087 is 78036661.

It is not a de Polignac number, because 16663087 - 2⁷ = 16662959 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 (16663037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169983 + ... + 170080.

It is an arithmetic number, because the mean of its divisors is an integer number (3230608).

Almost surely, 2^16663087 is an apocalyptic number.

16663087 is a deficient number, since it is larger than the sum of its proper divisors (2720561).

16663087 is an equidigital number, since it uses as much as digits as its factorization.

16663087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340077 (or 340070 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 16663087 is about 4082.0444632561. The cubic root of 16663087 is about 255.4181886062.

It can be divided in two parts, 1666 and 3087, that added together give a triangular number (4753 = T₉₇).

The spelling of 16663087 in words is "sixteen million, six hundred sixty-three thousand, eighty-seven".