66505241 has 8 divisors (see below), whose sum is σ = 76819104. Its totient is φ = 56902720.

The previous prime is 66505217. The next prime is 66505249. The reversal of 66505241 is 14250566.

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 66505241 - 2⁶ = 66505177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66505249) 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, 177635 + ... + 178008.

It is an arithmetic number, because the mean of its divisors is an integer number (9602388).

Almost surely, 2^66505241 is an apocalyptic number.

It is an amenable number.

66505241 is a deficient number, since it is larger than the sum of its proper divisors (10313863).

66505241 is a wasteful number, since it uses less digits than its factorization.

66505241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355671.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 66505241 is about 8155.0745551466. The cubic root of 66505241 is about 405.1525940258.

The spelling of 66505241 in words is "sixty-six million, five hundred five thousand, two hundred forty-one".