66040124535 has 48 divisors (see below), whose sum is σ = 142715289600. Its totient is φ = 27445245120.

The previous prime is 66040124461. The next prime is 66040124599. The reversal of 66040124535 is 53542104066.

66040124535 is a `hidden beast` number, since 6 + 6 + 0 + 401 + 245 + 3 + 5 = 666.

66040124535 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 66040124535 - 2⁷ = 66040124407 is a prime.

It is a super-2 number, since 2×66040124535² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66040124535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9526135 + ... + 9533064.

It is an arithmetic number, because the mean of its divisors is an integer number (2973235200).

Almost surely, 2^66040124535 is an apocalyptic number.

66040124535 is an abundant number, since it is smaller than the sum of its proper divisors (76675165065).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66040124535 is a wasteful number, since it uses less digits than its factorization.

66040124535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19059228 (or 19059225 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 66040124535 in words is "sixty-six billion, forty million, one hundred twenty-four thousand, five hundred thirty-five".