66727361 has 4 divisors (see below), whose sum is σ = 66968532. Its totient is φ = 66486192.

The previous prime is 66727343. The next prime is 66727379. The reversal of 66727361 is 16372766.

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

It is an interprime number because it is at equal distance from previous prime (66727343) and next prime (66727379).

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 52287361 = 3800^2 + 7231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66727361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66727321) 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, 120170 + ... + 120723.

It is an arithmetic number, because the mean of its divisors is an integer number (16742133).

Almost surely, 2^66727361 is an apocalyptic number.

It is an amenable number.

66727361 is a deficient number, since it is larger than the sum of its proper divisors (241171).

66727361 is a wasteful number, since it uses less digits than its factorization.

66727361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241170.

The product of its digits is 63504, while the sum is 38.

The square root of 66727361 is about 8168.6817173887. The cubic root of 66727361 is about 405.6031474462.

The spelling of 66727361 in words is "sixty-six million, seven hundred twenty-seven thousand, three hundred sixty-one".