4051720866 has 16 divisors (see below), whose sum is σ = 8109129600. Its totient is φ = 1349625648.

The previous prime is 4051720847. The next prime is 4051720879. The reversal of 4051720866 is 6680271504.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227706 + ... + 244853.

It is an arithmetic number, because the mean of its divisors is an integer number (506820600).

Almost surely, 2^4051720866 is an apocalyptic number.

4051720866 is an abundant number, since it is smaller than the sum of its proper divisors (4057408734).

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

4051720866 is a wasteful number, since it uses less digits than its factorization.

4051720866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473993.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 4051720866 is about 63653.1292710735. The cubic root of 4051720866 is about 1594.2135863733.

It can be divided in two parts, 405 and 1720866, that added together give a palindrome (1721271).

The spelling of 4051720866 in words is "four billion, fifty-one million, seven hundred twenty thousand, eight hundred sixty-six".