16662587 has 2 divisors, whose sum is σ = 16662588. Its totient is φ = 16662586.

The previous prime is 16662571. The next prime is 16662589. The reversal of 16662587 is 78526661.

It is a strong prime.

It is an emirp because it is prime and its reverse (78526661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16662587 - 2⁴ = 16662571 is a prime.

Together with 16662589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16662589) 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 as a sum of consecutive naturals, namely, 8331293 + 8331294.

It is an arithmetic number, because the mean of its divisors is an integer number (8331294).

Almost surely, 2^16662587 is an apocalyptic number.

16662587 is a deficient number, since it is larger than the sum of its proper divisors (1).

16662587 is an equidigital number, since it uses as much as digits as its factorization.

16662587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 16662587 is about 4081.9832189758. The cubic root of 16662587 is about 255.4156338501.

The spelling of 16662587 in words is "sixteen million, six hundred sixty-two thousand, five hundred eighty-seven".