1766728668 has 12 divisors (see below), whose sum is σ = 4122366920. Its totient is φ = 588909552.

The previous prime is 1766728619. The next prime is 1766728669. The reversal of 1766728668 is 8668276671.

1766728668 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1766728669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73613683 + ... + 73613706.

Almost surely, 2^1766728668 is an apocalyptic number.

It is an amenable number.

1766728668 is an abundant number, since it is smaller than the sum of its proper divisors (2355638252).

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

1766728668 is a wasteful number, since it uses less digits than its factorization.

1766728668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147227396 (or 147227394 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 57.

The square root of 1766728668 is about 42032.4715904264. The cubic root of 1766728668 is about 1208.8988155571.

The spelling of 1766728668 in words is "one billion, seven hundred sixty-six million, seven hundred twenty-eight thousand, six hundred sixty-eight".