66852659523 has 18 divisors (see below), whose sum is σ = 96529405836. Its totient is φ = 41136515472.

The previous prime is 66852659521. The next prime is 66852659591. The reversal of 66852659523 is 32595625866.

It is not a de Polignac number, because 66852659523 - 2¹ = 66852659521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66852659521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5816140 + ... + 5827622.

Almost surely, 2^66852659523 is an apocalyptic number.

66852659523 is a deficient number, since it is larger than the sum of its proper divisors (29676746313).

66852659523 is an frugal number, since it uses more digits than its factorization.

66852659523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22995 (or 11499 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 57.

The spelling of 66852659523 in words is "sixty-six billion, eight hundred fifty-two million, six hundred fifty-nine thousand, five hundred twenty-three".