10665031280 has 20 divisors (see below), whose sum is σ = 24796197912. Its totient is φ = 4266012480.

The previous prime is 10665031211. The next prime is 10665031283. The reversal of 10665031280 is 8213056601.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×10665031280² (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 (10665031283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66656366 + ... + 66656525.

Almost surely, 2^10665031280 is an apocalyptic number.

10665031280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10665031280 is an abundant number, since it is smaller than the sum of its proper divisors (14131166632).

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

10665031280 is a wasteful number, since it uses less digits than its factorization.

10665031280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133312904 (or 133312898 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 10665031280 its reverse (8213056601), we get a palindrome (18878087881).

The spelling of 10665031280 in words is "ten billion, six hundred sixty-five million, thirty-one thousand, two hundred eighty".