16866473 has 4 divisors (see below), whose sum is σ = 18163908. Its totient is φ = 15569040.

The previous prime is 16866427. The next prime is 16866491. The reversal of 16866473 is 37466861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37466861 = 17 ⋅2203933.

It can be written as a sum of positive squares in 2 ways, for example, as 11539609 + 5326864 = 3397^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 16866473 - 2⁸ = 16866217 is a prime.

It is a super-2 number, since 2×16866473² = 568955822919458, which contains 22 as substring.

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 16866473.

It is not an unprimeable number, because it can be changed into a prime (16866673) 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, 648698 + ... + 648723.

It is an arithmetic number, because the mean of its divisors is an integer number (4540977).

Almost surely, 2^16866473 is an apocalyptic number.

16866473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16866473 is a deficient number, since it is larger than the sum of its proper divisors (1297435).

16866473 is a wasteful number, since it uses less digits than its factorization.

16866473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297434.

The product of its digits is 145152, while the sum is 41.

The square root of 16866473 is about 4106.8811767569. The cubic root of 16866473 is about 256.4531818637.

The spelling of 16866473 in words is "sixteen million, eight hundred sixty-six thousand, four hundred seventy-three".