16661264 has 10 divisors (see below), whose sum is σ = 32281230. Its totient is φ = 8330624.

The previous prime is 16661261. The next prime is 16661287. The reversal of 16661264 is 46216661.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 6801664 = 3140^2 + 2608^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16661264.

It is not an unprimeable number, because it can be changed into a prime (16661261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520649 + ... + 520680.

It is an arithmetic number, because the mean of its divisors is an integer number (3228123).

Almost surely, 2^16661264 is an apocalyptic number.

It is an amenable number.

16661264 is a deficient number, since it is larger than the sum of its proper divisors (15619966).

16661264 is a wasteful number, since it uses less digits than its factorization.

16661264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041337 (or 1041331 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 16661264 is about 4081.8211621775. The cubic root of 16661264 is about 255.4088737188.

The spelling of 16661264 in words is "sixteen million, six hundred sixty-one thousand, two hundred sixty-four".