66510511171135 has 4 divisors (see below), whose sum is σ = 79812613405368. Its totient is φ = 53208408936904.

The previous prime is 66510511170923. The next prime is 66510511171151. The reversal of 66510511171135 is 53117111501566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66510511171135 - 2²⁷ = 66510376953407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66510511171091 and 66510511171100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6651051117109 + ... + 6651051117118.

It is an arithmetic number, because the mean of its divisors is an integer number (19953153351342).

Almost surely, 2^{66510511171135} is an apocalyptic number.

66510511171135 is a deficient number, since it is larger than the sum of its proper divisors (13302102234233).

66510511171135 is a wasteful number, since it uses less digits than its factorization.

66510511171135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13302102234232.

The product of its (nonzero) digits is 94500, while the sum is 43.

The spelling of 66510511171135 in words is "sixty-six trillion, five hundred ten billion, five hundred eleven million, one hundred seventy-one thousand, one hundred thirty-five".