2697661 has 2 divisors, whose sum is σ = 2697662. Its totient is φ = 2697660.

The previous prime is 2697637. The next prime is 2697689. The reversal of 2697661 is 1667962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1454436 + 1243225 = 1206^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2697661 - 2⁷ = 2697533 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 2697661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2697061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1348830 + 1348831.

It is an arithmetic number, because the mean of its divisors is an integer number (1348831).

2^2697661 is an apocalyptic number.

It is an amenable number.

2697661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2697661 is an equidigital number, since it uses as much as digits as its factorization.

2697661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 2697661 is about 1642.4557832709. The cubic root of 2697661 is about 139.2074434794.

The spelling of 2697661 in words is "two million, six hundred ninety-seven thousand, six hundred sixty-one".