66858528093 has 24 divisors (see below), whose sum is σ = 105246702432. Its totient is φ = 37634645664.

The previous prime is 66858528091. The next prime is 66858528109. The reversal of 66858528093 is 39082585866.

66858528093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66858528093 - 2¹ = 66858528091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66858528091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3384330 + ... + 3404027.

It is an arithmetic number, because the mean of its divisors is an integer number (4385279268).

Almost surely, 2^66858528093 is an apocalyptic number.

It is an amenable number.

66858528093 is a deficient number, since it is larger than the sum of its proper divisors (38388174339).

66858528093 is a wasteful number, since it uses less digits than its factorization.

66858528093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788441 (or 6788434 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 66858528093 in words is "sixty-six billion, eight hundred fifty-eight million, five hundred twenty-eight thousand, ninety-three".