727166421 has 24 divisors (see below), whose sum is σ = 1092433056. Its totient is φ = 465726240.

The previous prime is 727166383. The next prime is 727166431. The reversal of 727166421 is 124661727.

727166421 is a `hidden beast` number, since 7 + 2 + 7 + 1 + 6 + 642 + 1 = 666.

It is not a de Polignac number, because 727166421 - 2⁹ = 727165909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727166431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8206 + ... + 39008.

It is an arithmetic number, because the mean of its divisors is an integer number (45518044).

Almost surely, 2^727166421 is an apocalyptic number.

It is an amenable number.

727166421 is a deficient number, since it is larger than the sum of its proper divisors (365266635).

727166421 is a wasteful number, since it uses less digits than its factorization.

727166421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30913 (or 30910 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 727166421 is about 26966.0234554522. The cubic root of 727166421 is about 899.2448072334.

The spelling of 727166421 in words is "seven hundred twenty-seven million, one hundred sixty-six thousand, four hundred twenty-one".