5666961 has 16 divisors (see below), whose sum is σ = 7767360. Its totient is φ = 3673920.

The previous prime is 5666953. The next prime is 5666963. The reversal of 5666961 is 1696665.

It is not a de Polignac number, because 5666961 - 2³ = 5666953 is a prime.

It is a super-2 number, since 2×5666961² = 64228893951042, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5666963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31570 + ... + 31748.

It is an arithmetic number, because the mean of its divisors is an integer number (485460).

Almost surely, 2^5666961 is an apocalyptic number.

It is an amenable number.

5666961 is a deficient number, since it is larger than the sum of its proper divisors (2100399).

5666961 is a wasteful number, since it uses less digits than its factorization.

5666961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its digits is 58320, while the sum is 39.

The square root of 5666961 is about 2380.5379644106. The cubic root of 5666961 is about 178.2857947257.

The spelling of 5666961 in words is "five million, six hundred sixty-six thousand, nine hundred sixty-one".