66452539 has 8 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 65494056.

The previous prime is 66452537. The next prime is 66452563. The reversal of 66452539 is 93525466.

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 66452539 - 2¹ = 66452537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66452537) 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 7 ways as a sum of consecutive naturals, for example, 49722 + ... + 51040.

It is an arithmetic number, because the mean of its divisors is an integer number (8426880).

Almost surely, 2^66452539 is an apocalyptic number.

66452539 is a deficient number, since it is larger than the sum of its proper divisors (962501).

66452539 is a wasteful number, since it uses less digits than its factorization.

66452539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009.

The product of its digits is 194400, while the sum is 40.

The square root of 66452539 is about 8151.8426751257. The cubic root of 66452539 is about 405.0455448450.

The spelling of 66452539 in words is "sixty-six million, four hundred fifty-two thousand, five hundred thirty-nine".