12755661 has 16 divisors (see below), whose sum is σ = 18281664. Its totient is φ = 7881984.

The previous prime is 12755657. The next prime is 12755671. The reversal of 12755661 is 16655721.

It is not a de Polignac number, because 12755661 - 2² = 12755657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12755651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (1142604).

Almost surely, 2^12755661 is an apocalyptic number.

It is an amenable number.

12755661 is a deficient number, since it is larger than the sum of its proper divisors (5526003).

12755661 is a wasteful number, since it uses less digits than its factorization.

12755661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820.

The product of its digits is 12600, while the sum is 33.

The square root of 12755661 is about 3571.5068248570. The cubic root of 12755661 is about 233.6510065345.

The spelling of 12755661 in words is "twelve million, seven hundred fifty-five thousand, six hundred sixty-one".