66135566112 has 96 divisors (see below), whose sum is σ = 216443695104. Its totient is φ = 17178067200.

The previous prime is 66135566093. The next prime is 66135566113. The reversal of 66135566112 is 21166553166.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (66135566113) 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, 4466064 + ... + 4480847.

It is an arithmetic number, because the mean of its divisors is an integer number (2254621824).

Almost surely, 2^66135566112 is an apocalyptic number.

It is an amenable number.

66135566112 is an abundant number, since it is smaller than the sum of its proper divisors (150308128992).

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

66135566112 is a wasteful number, since it uses less digits than its factorization.

66135566112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8946942 (or 8946934 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The spelling of 66135566112 in words is "sixty-six billion, one hundred thirty-five million, five hundred sixty-six thousand, one hundred twelve".