13061661 has 16 divisors (see below), whose sum is σ = 18549504. Its totient is φ = 8146944.

The previous prime is 13061641. The next prime is 13061663. The reversal of 13061661 is 16616031.

It is not a de Polignac number, because 13061661 - 2¹⁰ = 13060637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13061663) 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 15 ways as a sum of consecutive naturals, for example, 9180 + ... + 10506.

It is an arithmetic number, because the mean of its divisors is an integer number (1159344).

Almost surely, 2^13061661 is an apocalyptic number.

It is an amenable number.

13061661 is a deficient number, since it is larger than the sum of its proper divisors (5487843).

13061661 is a wasteful number, since it uses less digits than its factorization.

13061661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 13061661 is about 3614.0920021494. The cubic root of 13061661 is about 235.5046406197.

Adding to 13061661 its reverse (16616031), we get a palindrome (29677692).

The spelling of 13061661 in words is "thirteen million, sixty-one thousand, six hundred sixty-one".