16663347 has 8 divisors (see below), whose sum is σ = 24686480. Its totient is φ = 11108880.

The previous prime is 16663321. The next prime is 16663351. The reversal of 16663347 is 74336661.

It is a happy number.

It is not a de Polignac number, because 16663347 - 2⁷ = 16663219 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 (16663307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308554 + ... + 308607.

It is an arithmetic number, because the mean of its divisors is an integer number (3085810).

Almost surely, 2^16663347 is an apocalyptic number.

16663347 is a deficient number, since it is larger than the sum of its proper divisors (8023133).

16663347 is an equidigital number, since it uses as much as digits as its factorization.

16663347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617170 (or 617164 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 16663347 is about 4082.0763099188. The cubic root of 16663347 is about 255.4195170592.

The spelling of 16663347 in words is "sixteen million, six hundred sixty-three thousand, three hundred forty-seven".