5666785 has 4 divisors (see below), whose sum is σ = 6800148. Its totient is φ = 4533424.

The previous prime is 5666783. The next prime is 5666789. The reversal of 5666785 is 5876665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2509056 + 3157729 = 1584^2 + 1777^2 .

It is a cyclic number.

It is not a de Polignac number, because 5666785 - 2¹ = 5666783 is a prime.

It is a super-2 number, since 2×5666785² = 64224904472450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5666783) 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, 566674 + ... + 566683.

It is an arithmetic number, because the mean of its divisors is an integer number (1700037).

Almost surely, 2^5666785 is an apocalyptic number.

It is an amenable number.

5666785 is a deficient number, since it is larger than the sum of its proper divisors (1133363).

5666785 is a wasteful number, since it uses less digits than its factorization.

5666785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133362.

The product of its digits is 302400, while the sum is 43.

The square root of 5666785 is about 2380.5009976894. The cubic root of 5666785 is about 178.2839490202.

It can be divided in two parts, 566678 and 5, that multiplied together give a triangular number (2833390 = T₂₃₈₀).

The spelling of 5666785 in words is "five million, six hundred sixty-six thousand, seven hundred eighty-five".