2277661 has 2 divisors, whose sum is σ = 2277662. Its totient is φ = 2277660.

The previous prime is 2277659. The next prime is 2277703. The reversal of 2277661 is 1667722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 1012036 = 1125^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 2277661 - 2¹ = 2277659 is a prime.

Together with 2277659, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2¹⁷ + 2²¹ + 7³ + 7⁴ + 6² + 6⁶ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2277641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1138830 + 1138831.

It is an arithmetic number, because the mean of its divisors is an integer number (1138831).

2^2277661 is an apocalyptic number.

It is an amenable number.

2277661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2277661 is an equidigital number, since it uses as much as digits as its factorization.

2277661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 2277661 is about 1509.1921680157. The cubic root of 2277661 is about 131.5718643177.

The spelling of 2277661 in words is "two million, two hundred seventy-seven thousand, six hundred sixty-one".