16861266 has 12 divisors (see below), whose sum is σ = 36532782. Its totient is φ = 5620416.

The previous prime is 16861259. The next prime is 16861283. The reversal of 16861266 is 66216861.

It can be written as a sum of positive squares in only one way, i.e., 11029041 + 5832225 = 3321^2 + 2415^2 .

It is a super-2 number, since 2×16861266² = 568604582245512, 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 16861266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 468351 + ... + 468386.

Almost surely, 2^16861266 is an apocalyptic number.

16861266 is an abundant number, since it is smaller than the sum of its proper divisors (19671516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16861266 is a wasteful number, since it uses less digits than its factorization.

16861266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936745 (or 936742 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16861266 is about 4106.2471917799. The cubic root of 16861266 is about 256.4267884942.

The spelling of 16861266 in words is "sixteen million, eight hundred sixty-one thousand, two hundred sixty-six".