11712661 has 2 divisors, whose sum is σ = 11712662. Its totient is φ = 11712660.

The previous prime is 11712611. The next prime is 11712689. The reversal of 11712661 is 16621711.

It is a happy number.

11712661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9492561 + 2220100 = 3081^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 11712661 - 2¹⁵ = 11679893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11712611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5856330 + 5856331.

It is an arithmetic number, because the mean of its divisors is an integer number (5856331).

Almost surely, 2^11712661 is an apocalyptic number.

It is an amenable number.

11712661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11712661 is an equidigital number, since it uses as much as digits as its factorization.

11712661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 11712661 is about 3422.3765134771. The cubic root of 11712661 is about 227.1007270314.

The spelling of 11712661 in words is "eleven million, seven hundred twelve thousand, six hundred sixty-one".