727756668 has 18 divisors (see below), whose sum is σ = 1839607224. Its totient is φ = 242585544.

The previous prime is 727756661. The next prime is 727756693. The reversal of 727756668 is 866657727.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727756661) 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 5 ways as a sum of consecutive naturals, for example, 10107696 + ... + 10107767.

Almost surely, 2^727756668 is an apocalyptic number.

It is an amenable number.

727756668 is an abundant number, since it is smaller than the sum of its proper divisors (1111850556).

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

727756668 is a wasteful number, since it uses less digits than its factorization.

727756668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20215473 (or 20215468 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The square root of 727756668 is about 26976.9655076326. The cubic root of 727756668 is about 899.4880495813.

The spelling of 727756668 in words is "seven hundred twenty-seven million, seven hundred fifty-six thousand, six hundred sixty-eight".