10661331 has 4 divisors (see below), whose sum is σ = 14215112. Its totient is φ = 7107552.

The previous prime is 10661327. The next prime is 10661333. The reversal of 10661331 is 13316601.

10661331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13316601 = 3 ⋅4438867.

It is not a de Polignac number, because 10661331 - 2² = 10661327 is a prime.

It is a super-2 number, since 2×10661331² = 227327957383122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10661298 and 10661307.

It is not an unprimeable number, because it can be changed into a prime (10661333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776886 + ... + 1776891.

It is an arithmetic number, because the mean of its divisors is an integer number (3553778).

Almost surely, 2^10661331 is an apocalyptic number.

10661331 is a deficient number, since it is larger than the sum of its proper divisors (3553781).

10661331 is an equidigital number, since it uses as much as digits as its factorization.

10661331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553780.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 10661331 is about 3265.1693677358. The cubic root of 10661331 is about 220.0917730063.

Adding to 10661331 its reverse (13316601), we get a palindrome (23977932).

The spelling of 10661331 in words is "ten million, six hundred sixty-one thousand, three hundred thirty-one".