16645427 has 2 divisors, whose sum is σ = 16645428. Its totient is φ = 16645426.

The previous prime is 16645411. The next prime is 16645469. The reversal of 16645427 is 72454661.

It is a weak prime.

It is an emirp because it is prime and its reverse (72454661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16645427 - 2⁴ = 16645411 is a prime.

It is not a weakly prime, because it can be changed into another prime (16645477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322713 + 8322714.

It is an arithmetic number, because the mean of its divisors is an integer number (8322714).

Almost surely, 2^16645427 is an apocalyptic number.

16645427 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645427 is an equidigital number, since it uses as much as digits as its factorization.

16645427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 16645427 is about 4079.8807580614. The cubic root of 16645427 is about 255.3279236258.

The spelling of 16645427 in words is "sixteen million, six hundred forty-five thousand, four hundred twenty-seven".