66442511532 has 48 divisors (see below), whose sum is σ = 156348444672. Its totient is φ = 21959898240.

The previous prime is 66442511489. The next prime is 66442511537. The reversal of 66442511532 is 23511524466.

It is not an unprimeable number, because it can be changed into a prime (66442511537) 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, 1395357 + ... + 1442187.

It is an arithmetic number, because the mean of its divisors is an integer number (3257259264).

Almost surely, 2^66442511532 is an apocalyptic number.

It is an amenable number.

66442511532 is an abundant number, since it is smaller than the sum of its proper divisors (89905933140).

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

66442511532 is a wasteful number, since it uses less digits than its factorization.

66442511532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47838 (or 47836 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The spelling of 66442511532 in words is "sixty-six billion, four hundred forty-two million, five hundred eleven thousand, five hundred thirty-two".