5607661 has 2 divisors, whose sum is σ = 5607662. Its totient is φ = 5607660.

The previous prime is 5607659. The next prime is 5607691. The reversal of 5607661 is 1667065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 1425636 = 2045^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 5607661 - 2¹ = 5607659 is a prime.

Together with 5607659, 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 (5607601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2803830 + 2803831.

It is an arithmetic number, because the mean of its divisors is an integer number (2803831).

Almost surely, 2^5607661 is an apocalyptic number.

It is an amenable number.

5607661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5607661 is an equidigital number, since it uses as much as digits as its factorization.

5607661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 5607661 is about 2368.0500417010. The cubic root of 5607661 is about 177.6617424082.

The spelling of 5607661 in words is "five million, six hundred seven thousand, six hundred sixty-one".