10566661605 has 16 divisors (see below), whose sum is σ = 16912368000. Its totient is φ = 5633649728.

The previous prime is 10566661543. The next prime is 10566661639. The reversal of 10566661605 is 50616666501.

It is a cyclic number.

It is not a de Polignac number, because 10566661605 - 2¹⁰ = 10566660581 is a prime.

It is a super-2 number, since 2×10566661605² (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 15 ways as a sum of consecutive naturals, for example, 72462 + ... + 162431.

It is an arithmetic number, because the mean of its divisors is an integer number (1057023000).

Almost surely, 2^10566661605 is an apocalyptic number.

10566661605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10566661605 is a deficient number, since it is larger than the sum of its proper divisors (6345706395).

10566661605 is a wasteful number, since it uses less digits than its factorization.

10566661605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237900.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 10566661605 in words is "ten billion, five hundred sixty-six million, six hundred sixty-one thousand, six hundred five".