10661455566 has 96 divisors (see below), whose sum is σ = 23857307136. Its totient is φ = 3439800000.

The previous prime is 10661455543. The next prime is 10661455577. The reversal of 10661455566 is 66555416601.

10661455566 is a `hidden beast` number, since 10 + 66 + 14 + 5 + 5 + 566 = 666.

It is a super-2 number, since 2×10661455566² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19490505 + ... + 19491051.

It is an arithmetic number, because the mean of its divisors is an integer number (248513616).

Almost surely, 2^10661455566 is an apocalyptic number.

10661455566 is an abundant number, since it is smaller than the sum of its proper divisors (13195851570).

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

10661455566 is a wasteful number, since it uses less digits than its factorization.

10661455566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 10661455566 in words is "ten billion, six hundred sixty-one million, four hundred fifty-five thousand, five hundred sixty-six".