66131526552 has 96 divisors (see below), whose sum is σ = 204599738880. Its totient is φ = 17441274240.

The previous prime is 66131526523. The next prime is 66131526557. The reversal of 66131526552 is 25562513166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131526557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1136224 + ... + 1193007.

It is an arithmetic number, because the mean of its divisors is an integer number (2131247280).

Almost surely, 2^66131526552 is an apocalyptic number.

It is an amenable number.

66131526552 is an abundant number, since it is smaller than the sum of its proper divisors (138468212328).

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

66131526552 is a wasteful number, since it uses less digits than its factorization.

66131526552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329273 (or 2329256 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The spelling of 66131526552 in words is "sixty-six billion, one hundred thirty-one million, five hundred twenty-six thousand, five hundred fifty-two".