13170661 has 6 divisors (see below), whose sum is σ = 15321030. Its totient is φ = 11289096.

The previous prime is 13170653. The next prime is 13170671. The reversal of 13170661 is 16607131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 6280036 = 2625^2 + 2506^2 .

It is not a de Polignac number, because 13170661 - 2³ = 13170653 is a prime.

It is a super-2 number, since 2×13170661² = 346932622353842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13170671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134346 + ... + 134443.

It is an arithmetic number, because the mean of its divisors is an integer number (2553505).

Almost surely, 2^13170661 is an apocalyptic number.

It is an amenable number.

13170661 is a deficient number, since it is larger than the sum of its proper divisors (2150369).

13170661 is an equidigital number, since it uses as much as digits as its factorization.

13170661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268803 (or 268796 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13170661 is about 3629.1405318615. The cubic root of 13170661 is about 236.1579247963.

Adding to 13170661 its reverse (16607131), we get a palindrome (29777792).

It can be divided in two parts, 13170 and 661, that added together give a palindrome (13831).

The spelling of 13170661 in words is "thirteen million, one hundred seventy thousand, six hundred sixty-one".