4891321966 has 16 divisors (see below), whose sum is σ = 7462334880. Its totient is φ = 2403931680.

The previous prime is 4891321961. The next prime is 4891321993. The reversal of 4891321966 is 6691231984.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891321961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177340 + ... + 203056.

It is an arithmetic number, because the mean of its divisors is an integer number (466395930).

Almost surely, 2^4891321966 is an apocalyptic number.

4891321966 is a deficient number, since it is larger than the sum of its proper divisors (2571012914).

4891321966 is a wasteful number, since it uses less digits than its factorization.

4891321966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27339.

The product of its digits is 559872, while the sum is 49.

The square root of 4891321966 is about 69937.9865738212. The cubic root of 4891321966 is about 1697.4959635164.

The spelling of 4891321966 in words is "four billion, eight hundred ninety-one million, three hundred twenty-one thousand, nine hundred sixty-six".