16616851 has 2 divisors, whose sum is σ = 16616852. Its totient is φ = 16616850.

The previous prime is 16616843. The next prime is 16616903. The reversal of 16616851 is 15861661.

It is a weak prime.

It is an emirp because it is prime and its reverse (15861661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16616851 - 2³ = 16616843 is a prime.

It is a super-2 number, since 2×16616851² = 552239474312402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16616801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308425 + 8308426.

It is an arithmetic number, because the mean of its divisors is an integer number (8308426).

Almost surely, 2^16616851 is an apocalyptic number.

16616851 is a deficient number, since it is larger than the sum of its proper divisors (1).

16616851 is an equidigital number, since it uses as much as digits as its factorization.

16616851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 16616851 is about 4076.3771905946. The cubic root of 16616851 is about 255.1817287178.

The spelling of 16616851 in words is "sixteen million, six hundred sixteen thousand, eight hundred fifty-one".