727666 has 4 divisors (see below), whose sum is σ = 1091502. Its totient is φ = 363832.

The previous prime is 727633. The next prime is 727667. The reversal of 727666 is 666727.

727666 is nontrivially palindromic in base 8.

727666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 594441 + 133225 = 771^2 + 365^2 .

It is not an unprimeable number, because it can be changed into a prime (727667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181915 + ... + 181918.

2⁷²⁷⁶⁶⁶ is an apocalyptic number.

727666 is a deficient number, since it is larger than the sum of its proper divisors (363836).

727666 is a wasteful number, since it uses less digits than its factorization.

727666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363835.

The product of its digits is 21168, while the sum is 34.

The square root of 727666 is about 853.0334108345. The cubic root of 727666 is about 89.9450693611.

The spelling of 727666 in words is "seven hundred twenty-seven thousand, six hundred sixty-six".