5981561766 has 12 divisors (see below), whose sum is σ = 12960050532. Its totient is φ = 1993853916.

The previous prime is 5981561749. The next prime is 5981561767. The reversal of 5981561766 is 6671651895.

5981561766 is a `hidden beast` number, since 5 + 9 + 8 + 1 + 561 + 76 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5981561767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166154476 + ... + 166154511.

It is an arithmetic number, because the mean of its divisors is an integer number (1080004211).

Almost surely, 2^5981561766 is an apocalyptic number.

5981561766 is an abundant number, since it is smaller than the sum of its proper divisors (6978488766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5981561766 is a wasteful number, since it uses less digits than its factorization.

5981561766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332308995 (or 332308992 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 5981561766 is about 77340.5570577301. The cubic root of 5981561766 is about 1815.2573220757.

The spelling of 5981561766 in words is "five billion, nine hundred eighty-one million, five hundred sixty-one thousand, seven hundred sixty-six".