5680661 has 4 divisors (see below), whose sum is σ = 6492192. Its totient is φ = 4869132.

The previous prime is 5680643. The next prime is 5680667. The reversal of 5680661 is 1660865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5680661 - 2¹⁰ = 5679637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5680667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405755 + ... + 405768.

It is an arithmetic number, because the mean of its divisors is an integer number (1623048).

Almost surely, 2^5680661 is an apocalyptic number.

It is an amenable number.

5680661 is a deficient number, since it is larger than the sum of its proper divisors (811531).

5680661 is an equidigital number, since it uses as much as digits as its factorization.

5680661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811530.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 5680661 is about 2383.4137282478. The cubic root of 5680661 is about 178.4293490193.

The spelling of 5680661 in words is "five million, six hundred eighty thousand, six hundred sixty-one".