10666166565 has 8 divisors (see below), whose sum is σ = 17065866528. Its totient is φ = 5688622160.

The previous prime is 10666166549. The next prime is 10666166603. The reversal of 10666166565 is 56566166601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10666166565 - 2⁴ = 10666166549 is a prime.

It is a super-2 number, since 2×10666166565² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355538871 + ... + 355538900.

It is an arithmetic number, because the mean of its divisors is an integer number (2133233316).

Almost surely, 2^10666166565 is an apocalyptic number.

10666166565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10666166565 is a deficient number, since it is larger than the sum of its proper divisors (6399699963).

10666166565 is an equidigital number, since it uses as much as digits as its factorization.

10666166565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711077779.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 10666166565 in words is "ten billion, six hundred sixty-six million, one hundred sixty-six thousand, five hundred sixty-five".