5991693566 has 16 divisors (see below), whose sum is σ = 9160614000. Its totient is φ = 2938198848.

The previous prime is 5991693553. The next prime is 5991693569. The reversal of 5991693566 is 6653961995.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5991693569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313925 + ... + 332463.

It is an arithmetic number, because the mean of its divisors is an integer number (572538375).

Almost surely, 2^5991693566 is an apocalyptic number.

5991693566 is a deficient number, since it is larger than the sum of its proper divisors (3168920434).

5991693566 is a wasteful number, since it uses less digits than its factorization.

5991693566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21643.

The product of its digits is 11809800, while the sum is 59.

The square root of 5991693566 is about 77406.0305531811. The cubic root of 5991693566 is about 1816.2816615573.

The spelling of 5991693566 in words is "five billion, nine hundred ninety-one million, six hundred ninety-three thousand, five hundred sixty-six".