16663694 has 8 divisors (see below), whose sum is σ = 25103520. Its totient is φ = 8295856.

The previous prime is 16663693. The next prime is 16663697. The reversal of 16663694 is 49636661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663693) 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 3 ways as a sum of consecutive naturals, for example, 17414 + ... + 18345.

It is an arithmetic number, because the mean of its divisors is an integer number (3137940).

Almost surely, 2^16663694 is an apocalyptic number.

16663694 is a deficient number, since it is larger than the sum of its proper divisors (8439826).

16663694 is a wasteful number, since it uses less digits than its factorization.

16663694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35994.

The product of its digits is 139968, while the sum is 41.

The square root of 16663694 is about 4082.1188125776. The cubic root of 16663694 is about 255.4212900115.

The spelling of 16663694 in words is "sixteen million, six hundred sixty-three thousand, six hundred ninety-four".