10665661071 has 32 divisors (see below), whose sum is σ = 15396853248. Its totient is φ = 6528424320.

The previous prime is 10665661063. The next prime is 10665661091. The reversal of 10665661071 is 17016656601.

It is not a de Polignac number, because 10665661071 - 2³ = 10665661063 is a prime.

It is a super-2 number, since 2×10665661071² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665661051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8351485 + ... + 8352761.

It is an arithmetic number, because the mean of its divisors is an integer number (481151664).

Almost surely, 2^10665661071 is an apocalyptic number.

10665661071 is a deficient number, since it is larger than the sum of its proper divisors (4731192177).

10665661071 is a wasteful number, since it uses less digits than its factorization.

10665661071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 10665661071 in words is "ten billion, six hundred sixty-five million, six hundred sixty-one thousand, seventy-one".