16408663 has 8 divisors (see below), whose sum is σ = 16673040. Its totient is φ = 16146240.

The previous prime is 16408661. The next prime is 16408673. The reversal of 16408663 is 36680461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16408663 - 2¹ = 16408661 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 (16408661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29181 + ... + 29737.

It is an arithmetic number, because the mean of its divisors is an integer number (2084130).

Almost surely, 2^16408663 is an apocalyptic number.

16408663 is a deficient number, since it is larger than the sum of its proper divisors (264377).

16408663 is an equidigital number, since it uses as much as digits as its factorization.

16408663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 16408663 is about 4050.7607927401. The cubic root of 16408663 is about 254.1115460630. Note that the first 3 decimals are identical.

It can be divided in two parts, 16408 and 663, that added together give a palindrome (17071).

The spelling of 16408663 in words is "sixteen million, four hundred eight thousand, six hundred sixty-three".