16663438 has 8 divisors (see below), whose sum is σ = 27267480. Its totient is φ = 7574280.

The previous prime is 16663433. The next prime is 16663441. The reversal of 16663438 is 83436661.

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

It is a junction number, because it is equal to n+sod(n) for n = 16663397 and 16663406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378693 + ... + 378736.

It is an arithmetic number, because the mean of its divisors is an integer number (3408435).

Almost surely, 2^16663438 is an apocalyptic number.

16663438 is a deficient number, since it is larger than the sum of its proper divisors (10604042).

16663438 is a wasteful number, since it uses less digits than its factorization.

16663438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757442.

The product of its digits is 62208, while the sum is 37.

The square root of 16663438 is about 4082.0874561920. The cubic root of 16663438 is about 255.4199820145.

The spelling of 16663438 in words is "sixteen million, six hundred sixty-three thousand, four hundred thirty-eight".