66135569136 has 160 divisors (see below), whose sum is σ = 217060773888. Its totient is φ = 16879656960.

The previous prime is 66135569069. The next prime is 66135569147. The reversal of 66135569136 is 63196553166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108801 + ... + 379616.

Almost surely, 2^66135569136 is an apocalyptic number.

It is an amenable number.

66135569136 is an abundant number, since it is smaller than the sum of its proper divisors (150925204752).

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

66135569136 is a wasteful number, since it uses less digits than its factorization.

66135569136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488479 (or 488473 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 51.

The spelling of 66135569136 in words is "sixty-six billion, one hundred thirty-five million, five hundred sixty-nine thousand, one hundred thirty-six".