5668781 has 4 divisors (see below), whose sum is σ = 5674464. Its totient is φ = 5663100.

The previous prime is 5668771. The next prime is 5668801. The reversal of 5668781 is 1878665.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5668781 is a prime.

It is a super-2 number, since 2×5668781² = 64270156051922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5668771) 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, 905 + ... + 3486.

It is an arithmetic number, because the mean of its divisors is an integer number (1418616).

Almost surely, 2^5668781 is an apocalyptic number.

It is an amenable number.

5668781 is a deficient number, since it is larger than the sum of its proper divisors (5683).

5668781 is a wasteful number, since it uses less digits than its factorization.

5668781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682.

The product of its digits is 80640, while the sum is 41.

The square root of 5668781 is about 2380.9202002587. The cubic root of 5668781 is about 178.3048787590.

The spelling of 5668781 in words is "five million, six hundred sixty-eight thousand, seven hundred eighty-one".