16267681 has 2 divisors, whose sum is σ = 16267682. Its totient is φ = 16267680.

The previous prime is 16267673. The next prime is 16267697. The reversal of 16267681 is 18676261.

16267681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 147456 = 4015^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 16267681 - 2³ = 16267673 is a prime.

It is a super-2 number, since 2×16267681² = 529274890235522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16267681.

It is not a weakly prime, because it can be changed into another prime (16267621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8133840 + 8133841.

It is an arithmetic number, because the mean of its divisors is an integer number (8133841).

Almost surely, 2^16267681 is an apocalyptic number.

It is an amenable number.

16267681 is a deficient number, since it is larger than the sum of its proper divisors (1).

16267681 is an equidigital number, since it uses as much as digits as its factorization.

16267681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 16267681 is about 4033.3213360703. The cubic root of 16267681 is about 253.3816826386.

The spelling of 16267681 in words is "sixteen million, two hundred sixty-seven thousand, six hundred eighty-one".