5990661 has 6 divisors (see below), whose sum is σ = 8653190. Its totient is φ = 3993768.

The previous prime is 5990659. The next prime is 5990669. The reversal of 5990661 is 1660995.

5990661 is a `hidden beast` number, since 599 + 0 + 6 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3218436 + 2772225 = 1794^2 + 1665^2 .

It is not a de Polignac number, because 5990661 - 2¹ = 5990659 is a prime.

It is an Ulam number.

It is a Duffinian number.

5990661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5990669) 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 5 ways as a sum of consecutive naturals, for example, 332806 + ... + 332823.

Almost surely, 2^5990661 is an apocalyptic number.

It is an amenable number.

5990661 is a deficient number, since it is larger than the sum of its proper divisors (2662529).

5990661 is a wasteful number, since it uses less digits than its factorization.

5990661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665635 (or 665632 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 5990661 is about 2447.5826850180. The cubic root of 5990661 is about 181.6177320527.

The spelling of 5990661 in words is "five million, nine hundred ninety thousand, six hundred sixty-one".