16662271 has 2 divisors, whose sum is σ = 16662272. Its totient is φ = 16662270.

The previous prime is 16662263. The next prime is 16662293. The reversal of 16662271 is 17226661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16662271 - 2³ = 16662263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16662241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8331135 + 8331136.

It is an arithmetic number, because the mean of its divisors is an integer number (8331136).

Almost surely, 2^16662271 is an apocalyptic number.

16662271 is a deficient number, since it is larger than the sum of its proper divisors (1).

16662271 is an equidigital number, since it uses as much as digits as its factorization.

16662271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 16662271 is about 4081.9445121167. The cubic root of 16662271 is about 255.4140192178.

The spelling of 16662271 in words is "sixteen million, six hundred sixty-two thousand, two hundred seventy-one".