4991165626766 has 32 divisors (see below), whose sum is σ = 8185241611008. Its totient is φ = 2263750229440.

The previous prime is 4991165626763. The next prime is 4991165626781. The reversal of 4991165626766 is 6676265611994.

It is a junction number, because it is equal to n+sod(n) for n = 4991165626696 and 4991165626705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991165626763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19372805 + ... + 19628751.

It is an arithmetic number, because the mean of its divisors is an integer number (255788800344).

Almost surely, 2^{4991165626766} is an apocalyptic number.

4991165626766 is a deficient number, since it is larger than the sum of its proper divisors (3194075984242).

4991165626766 is a wasteful number, since it uses less digits than its factorization.

4991165626766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257896.

The product of its digits is 176359680, while the sum is 68.

The spelling of 4991165626766 in words is "four trillion, nine hundred ninety-one billion, one hundred sixty-five million, six hundred twenty-six thousand, seven hundred sixty-six".