16662011 has 2 divisors, whose sum is σ = 16662012. Its totient is φ = 16662010.

The previous prime is 16662007. The next prime is 16662043. The reversal of 16662011 is 11026661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16662011 - 2² = 16662007 is a prime.

It is a super-2 number, since 2×16662011² = 555245221128242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16662311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8331005 + 8331006.

It is an arithmetic number, because the mean of its divisors is an integer number (8331006).

Almost surely, 2^16662011 is an apocalyptic number.

16662011 is a deficient number, since it is larger than the sum of its proper divisors (1).

16662011 is an equidigital number, since it uses as much as digits as its factorization.

16662011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 16662011 is about 4081.9126644258. The cubic root of 16662011 is about 255.4126907076.

Adding to 16662011 its reverse (11026661), we get a palindrome (27688672).

The spelling of 16662011 in words is "sixteen million, six hundred sixty-two thousand, eleven".