32668561 has 2 divisors, whose sum is σ = 32668562. Its totient is φ = 32668560.

The previous prime is 32668553. The next prime is 32668567. The reversal of 32668561 is 16586623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31708161 + 960400 = 5631^2 + 980^2 .

It is an emirp because it is prime and its reverse (16586623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32668561 - 2³ = 32668553 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32668561.

It is not a weakly prime, because it can be changed into another prime (32668567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16334280 + 16334281.

It is an arithmetic number, because the mean of its divisors is an integer number (16334281).

Almost surely, 2^32668561 is an apocalyptic number.

It is an amenable number.

32668561 is a deficient number, since it is larger than the sum of its proper divisors (1).

32668561 is an equidigital number, since it uses as much as digits as its factorization.

32668561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 32668561 is about 5715.6417837370. The cubic root of 32668561 is about 319.6759773534.

The spelling of 32668561 in words is "thirty-two million, six hundred sixty-eight thousand, five hundred sixty-one".