16494661 has 4 divisors (see below), whose sum is σ = 16538112. Its totient is φ = 16451212.

The previous prime is 16494659. The next prime is 16494683. The reversal of 16494661 is 16649461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16649461 = 677 ⋅24593.

It is a cyclic number.

It is not a de Polignac number, because 16494661 - 2¹ = 16494659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16494661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16494761) 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, 21151 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (4134528).

Almost surely, 2^16494661 is an apocalyptic number.

It is an amenable number.

16494661 is a deficient number, since it is larger than the sum of its proper divisors (43451).

16494661 is an equidigital number, since it uses as much as digits as its factorization.

16494661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43450.

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

The square root of 16494661 is about 4061.3619636767. The cubic root of 16494661 is about 254.5547066481.

The spelling of 16494661 in words is "sixteen million, four hundred ninety-four thousand, six hundred sixty-one".