16001663 has 2 divisors, whose sum is σ = 16001664. Its totient is φ = 16001662.

The previous prime is 16001659. The next prime is 16001681. The reversal of 16001663 is 36610061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16001663 - 2² = 16001659 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16001683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000831 + 8000832.

It is an arithmetic number, because the mean of its divisors is an integer number (8000832).

Almost surely, 2^16001663 is an apocalyptic number.

16001663 is a deficient number, since it is larger than the sum of its proper divisors (1).

16001663 is an equidigital number, since it uses as much as digits as its factorization.

16001663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 16001663 is about 4000.2078695988. The cubic root of 16001663 is about 251.9929398795.

The spelling of 16001663 in words is "sixteen million, one thousand, six hundred sixty-three".