10665660999 has 12 divisors (see below), whose sum is σ = 16542658104. Its totient is φ = 6094663344.

The previous prime is 10665660997. The next prime is 10665661007. The reversal of 10665660999 is 99906656601.

It is not a de Polignac number, because 10665660999 - 2¹ = 10665660997 is a prime.

It is a super-2 number, since 2×10665660999² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665660997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36277612 + ... + 36277905.

It is an arithmetic number, because the mean of its divisors is an integer number (1378554842).

Almost surely, 2^10665660999 is an apocalyptic number.

10665660999 is a deficient number, since it is larger than the sum of its proper divisors (5876997105).

10665660999 is an equidigital number, since it uses as much as digits as its factorization.

10665660999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72555534 (or 72555527 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 57.

The spelling of 10665660999 in words is "ten billion, six hundred sixty-five million, six hundred sixty thousand, nine hundred ninety-nine".