10661360253 has 4 divisors (see below), whose sum is σ = 14215147008. Its totient is φ = 7107573500.

The previous prime is 10661360249. The next prime is 10661360261. The reversal of 10661360253 is 35206316601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35206316601 = 3 ⋅11735438867.

It is a cyclic number.

It is not a de Polignac number, because 10661360253 - 2² = 10661360249 is a prime.

It is a super-2 number, since 2×10661360253² (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 (10661360243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776893373 + ... + 1776893378.

It is an arithmetic number, because the mean of its divisors is an integer number (3553786752).

Almost surely, 2^10661360253 is an apocalyptic number.

It is an amenable number.

10661360253 is a deficient number, since it is larger than the sum of its proper divisors (3553786755).

10661360253 is an equidigital number, since it uses as much as digits as its factorization.

10661360253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553786754.

The product of its (nonzero) digits is 19440, while the sum is 33.

Adding to 10661360253 its reverse (35206316601), we get a palindrome (45867676854).

The spelling of 10661360253 in words is "ten billion, six hundred sixty-one million, three hundred sixty thousand, two hundred fifty-three".