16366991 has 8 divisors (see below), whose sum is σ = 17172000. Its totient is φ = 15578080.

The previous prime is 16366969. The next prime is 16367003. The reversal of 16366991 is 19966361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16366991 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 (16366921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 6033.

It is an arithmetic number, because the mean of its divisors is an integer number (2146500).

Almost surely, 2^16366991 is an apocalyptic number.

16366991 is a deficient number, since it is larger than the sum of its proper divisors (805009).

16366991 is an equidigital number, since it uses as much as digits as its factorization.

16366991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8049.

The product of its digits is 52488, while the sum is 41.

The square root of 16366991 is about 4045.6137976826. The cubic root of 16366991 is about 253.8962469176.

The spelling of 16366991 in words is "sixteen million, three hundred sixty-six thousand, nine hundred ninety-one".