2655661 has 2 divisors, whose sum is σ = 2655662. Its totient is φ = 2655660.

The previous prime is 2655643. The next prime is 2655691. The reversal of 2655661 is 1665562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1512900 + 1142761 = 1230^2 + 1069^2 .

It is a cyclic number.

It is not a de Polignac number, because 2655661 - 2¹¹ = 2653613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2655691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327830 + 1327831.

It is an arithmetic number, because the mean of its divisors is an integer number (1327831).

2^2655661 is an apocalyptic number.

It is an amenable number.

2655661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2655661 is an equidigital number, since it uses as much as digits as its factorization.

2655661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 2655661 is about 1629.6198943312. The cubic root of 2655661 is about 138.4812192427.

Subtracting from 2655661 its reverse (1665562), we obtain a palindrome (990099).

The spelling of 2655661 in words is "two million, six hundred fifty-five thousand, six hundred sixty-one".