66544241 has 8 divisors (see below), whose sum is σ = 70700520. Its totient is φ = 62512128.

The previous prime is 66544237. The next prime is 66544279. The reversal of 66544241 is 14244566.

It can be written as a sum of positive squares in 4 ways, for example, as 47665216 + 18879025 = 6904^2 + 4345^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66544241 - 2² = 66544237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66544198 and 66544207.

It is not an unprimeable number, because it can be changed into a prime (66544211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29936 + ... + 32081.

It is an arithmetic number, because the mean of its divisors is an integer number (8837565).

Almost surely, 2^66544241 is an apocalyptic number.

It is an amenable number.

66544241 is a deficient number, since it is larger than the sum of its proper divisors (4156279).

66544241 is a wasteful number, since it uses less digits than its factorization.

66544241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62083.

The product of its digits is 23040, while the sum is 32.

The square root of 66544241 is about 8157.4653538952. The cubic root of 66544241 is about 405.2317750711.

The spelling of 66544241 in words is "sixty-six million, five hundred forty-four thousand, two hundred forty-one".