16663143 has 16 divisors (see below), whose sum is σ = 25456896. Its totient is φ = 9497280.

The previous prime is 16663121. The next prime is 16663159. The reversal of 16663143 is 34136661.

It is not a de Polignac number, because 16663143 - 2¹² = 16659047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16663143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10180 + ... + 11702.

It is an arithmetic number, because the mean of its divisors is an integer number (1591056).

Almost surely, 2^16663143 is an apocalyptic number.

16663143 is a deficient number, since it is larger than the sum of its proper divisors (8793753).

16663143 is a wasteful number, since it uses less digits than its factorization.

16663143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054.

The product of its digits is 7776, while the sum is 30.

The square root of 16663143 is about 4082.0513225583. The cubic root of 16663143 is about 255.4184747357.

The spelling of 16663143 in words is "sixteen million, six hundred sixty-three thousand, one hundred forty-three".