12610661 has 16 divisors (see below), whose sum is σ = 15465600. Its totient is φ = 10041408.

The previous prime is 12610649. The next prime is 12610667. The reversal of 12610661 is 16601621.

It is a cyclic number.

It is not a de Polignac number, because 12610661 - 2⁶ = 12610597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12610667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6155 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (966600).

Almost surely, 2^12610661 is an apocalyptic number.

It is an amenable number.

12610661 is a deficient number, since it is larger than the sum of its proper divisors (2854939).

12610661 is a wasteful number, since it uses less digits than its factorization.

12610661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12610661 is about 3551.1492505948. The cubic root of 12610661 is about 232.7622877253.

The spelling of 12610661 in words is "twelve million, six hundred ten thousand, six hundred sixty-one".