132661561 has 2 divisors, whose sum is σ = 132661562. Its totient is φ = 132661560.

The previous prime is 132661549. The next prime is 132661567. The reversal of 132661561 is 165166231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131537961 + 1123600 = 11469^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 132661561 - 2⁷ = 132661433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (132661567) 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 as a sum of consecutive naturals, namely, 66330780 + 66330781.

It is an arithmetic number, because the mean of its divisors is an integer number (66330781).

Almost surely, 2^132661561 is an apocalyptic number.

It is an amenable number.

132661561 is a deficient number, since it is larger than the sum of its proper divisors (1).

132661561 is an equidigital number, since it uses as much as digits as its factorization.

132661561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 132661561 is about 11517.8800566771. The cubic root of 132661561 is about 510.0135341788.

The spelling of 132661561 in words is "one hundred thirty-two million, six hundred sixty-one thousand, five hundred sixty-one".