16663373 has 4 divisors (see below), whose sum is σ = 16676028. Its totient is φ = 16650720.

The previous prime is 16663351. The next prime is 16663393. The reversal of 16663373 is 37336661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37336661 = 211 ⋅176951.

It can be written as a sum of positive squares in 2 ways, for example, as 6538249 + 10125124 = 2557^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 16663373 - 2²² = 12469069 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 (16663393) 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, 4088 + ... + 7073.

It is an arithmetic number, because the mean of its divisors is an integer number (4169007).

Almost surely, 2^16663373 is an apocalyptic number.

It is an amenable number.

16663373 is a deficient number, since it is larger than the sum of its proper divisors (12655).

16663373 is a wasteful number, since it uses less digits than its factorization.

16663373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12654.

The product of its digits is 40824, while the sum is 35.

The square root of 16663373 is about 4082.0794945714. The cubic root of 16663373 is about 255.4196499038.

The spelling of 16663373 in words is "sixteen million, six hundred sixty-three thousand, three hundred seventy-three".