103561866 has 24 divisors (see below), whose sum is σ = 224571204. Its totient is φ = 34491840.

The previous prime is 103561849. The next prime is 103561879. The reversal of 103561866 is 668165301.

It is a happy number.

103561866 is a `hidden beast` number, since 1 + 0 + 35 + 618 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 87329025 + 16232841 = 9345^2 + 4029^2 .

It is a super-3 number, since 3×103561866³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 103561866.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41206 + ... + 43646.

Almost surely, 2^103561866 is an apocalyptic number.

103561866 is an abundant number, since it is smaller than the sum of its proper divisors (121009338).

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

103561866 is a wasteful number, since it uses less digits than its factorization.

103561866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806 (or 4803 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 103561866 is about 10176.5350684798. The cubic root of 103561866 is about 469.6056236007.

The spelling of 103561866 in words is "one hundred three million, five hundred sixty-one thousand, eight hundred sixty-six".