5991766551 has 12 divisors (see below), whose sum is σ = 8657836200. Its totient is φ = 3993097680.

The previous prime is 5991766513. The next prime is 5991766553. The reversal of 5991766551 is 1556671995.

It is not a de Polignac number, because 5991766551 - 2¹¹ = 5991764503 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5991766553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90601 + ... + 142098.

It is an arithmetic number, because the mean of its divisors is an integer number (721486350).

Almost surely, 2^5991766551 is an apocalyptic number.

5991766551 is a deficient number, since it is larger than the sum of its proper divisors (2666069649).

5991766551 is a wasteful number, since it uses less digits than its factorization.

5991766551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235566 (or 235563 counting only the distinct ones).

The product of its digits is 2551500, while the sum is 54.

The square root of 5991766551 is about 77406.5019943415. The cubic root of 5991766551 is about 1816.2890362546.

The spelling of 5991766551 in words is "five billion, nine hundred ninety-one million, seven hundred sixty-six thousand, five hundred fifty-one".