2755661 has 2 divisors, whose sum is σ = 2755662. Its totient is φ = 2755660.

The previous prime is 2755637. The next prime is 2755663. The reversal of 2755661 is 1665572.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 1142761 = 1270^2 + 1069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2755661 is a prime.

Together with 2755663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2755663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1377830 + 1377831.

It is an arithmetic number, because the mean of its divisors is an integer number (1377831).

2^2755661 is an apocalyptic number.

It is an amenable number.

2755661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2755661 is an equidigital number, since it uses as much as digits as its factorization.

2755661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 2755661 is about 1660.0183733923. The cubic root of 2755661 is about 140.1980360639.

The spelling of 2755661 in words is "two million, seven hundred fifty-five thousand, six hundred sixty-one".