16218677 has 2 divisors, whose sum is σ = 16218678. Its totient is φ = 16218676.

The previous prime is 16218667. The next prime is 16218701. The reversal of 16218677 is 77681261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 6195121 = 3166^2 + 2489^2 .

It is a cyclic number.

It is not a de Polignac number, because 16218677 - 2¹⁴ = 16202293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16218677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16218637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109338 + 8109339.

It is an arithmetic number, because the mean of its divisors is an integer number (8109339).

Almost surely, 2^16218677 is an apocalyptic number.

It is an amenable number.

16218677 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218677 is an equidigital number, since it uses as much as digits as its factorization.

16218677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 16218677 is about 4027.2418601321. The cubic root of 16218677 is about 253.1270017014.

The spelling of 16218677 in words is "sixteen million, two hundred eighteen thousand, six hundred seventy-seven".