10661365343251 has 8 divisors (see below), whose sum is σ = 12185106723584. Its totient is φ = 9137796260040.

The previous prime is 10661365343243. The next prime is 10661365343261. The reversal of 10661365343251 is 15234356316601.

It is a happy number.

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

It is not a de Polignac number, because 10661365343251 - 2³ = 10661365343243 is a prime.

It is a super-2 number, since 2×10661365343251² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10661365343261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42941655 + ... + 43189216.

It is an arithmetic number, because the mean of its divisors is an integer number (1523138340448).

Almost surely, 2^{10661365343251} is an apocalyptic number.

10661365343251 is a deficient number, since it is larger than the sum of its proper divisors (1523741380333).

10661365343251 is an equidigital number, since it uses as much as digits as its factorization.

10661365343251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86148561.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 10661365343251 in words is "ten trillion, six hundred sixty-one billion, three hundred sixty-five million, three hundred forty-three thousand, two hundred fifty-one".