66013020656135 has 16 divisors (see below), whose sum is σ = 91549357704000. Its totient is φ = 44757463762176.

The previous prime is 66013020656041. The next prime is 66013020656137. The reversal of 66013020656135 is 53165602031066.

It is a cyclic number.

It is not a de Polignac number, because 66013020656135 - 2¹⁶ = 66013020590599 is a prime.

It is a super-2 number, since 2×66013020656135² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013020656137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10595987360 + ... + 10595993589.

It is an arithmetic number, because the mean of its divisors is an integer number (5721834856500).

Almost surely, 2^{66013020656135} is an apocalyptic number.

66013020656135 is a deficient number, since it is larger than the sum of its proper divisors (25536337047865).

66013020656135 is a wasteful number, since it uses less digits than its factorization.

66013020656135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21191981050.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 66013020656135 in words is "sixty-six trillion, thirteen billion, twenty million, six hundred fifty-six thousand, one hundred thirty-five".