16691446 has 4 divisors (see below), whose sum is σ = 25037172. Its totient is φ = 8345722.

The previous prime is 16691431. The next prime is 16691447. The reversal of 16691446 is 64419661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16691447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4172860 + ... + 4172863.

It is an arithmetic number, because the mean of its divisors is an integer number (6259293).

Almost surely, 2^16691446 is an apocalyptic number.

16691446 is a deficient number, since it is larger than the sum of its proper divisors (8345726).

16691446 is an equidigital number, since it uses as much as digits as its factorization.

16691446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345725.

The product of its digits is 31104, while the sum is 37.

The square root of 16691446 is about 4085.5166135998. The cubic root of 16691446 is about 255.5630056919.

The spelling of 16691446 in words is "sixteen million, six hundred ninety-one thousand, four hundred forty-six".