66135569137 has 8 divisors (see below), whose sum is σ = 73061159040. Its totient is φ = 59362190160.

The previous prime is 66135569069. The next prime is 66135569147. The reversal of 66135569137 is 73196553166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66135569137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66135569147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38051818 + ... + 38053555.

It is an arithmetic number, because the mean of its divisors is an integer number (9132644880).

Almost surely, 2^66135569137 is an apocalyptic number.

It is an amenable number.

66135569137 is a deficient number, since it is larger than the sum of its proper divisors (6925589903).

66135569137 is a wasteful number, since it uses less digits than its factorization.

66135569137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76105463.

The product of its digits is 3061800, while the sum is 52.

The spelling of 66135569137 in words is "sixty-six billion, one hundred thirty-five million, five hundred sixty-nine thousand, one hundred thirty-seven".