4991766 has 16 divisors (see below), whose sum is σ = 10751664. Its totient is φ = 1535904.

The previous prime is 4991719. The next prime is 4991771. The reversal of 4991766 is 6671994.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31921 + ... + 32076.

It is an arithmetic number, because the mean of its divisors is an integer number (671979).

Almost surely, 2^4991766 is an apocalyptic number.

4991766 is an abundant number, since it is smaller than the sum of its proper divisors (5759898).

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

4991766 is a wasteful number, since it uses less digits than its factorization.

4991766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64015.

The product of its digits is 81648, while the sum is 42.

The square root of 4991766 is about 2234.2260404892. The cubic root of 4991766 is about 170.9036768145.

The spelling of 4991766 in words is "four million, nine hundred ninety-one thousand, seven hundred sixty-six".