66253621182 has 96 divisors (see below), whose sum is σ = 155047429152. Its totient is φ = 18818666496.

The previous prime is 66253621163. The next prime is 66253621193. The reversal of 66253621182 is 28112635266.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51081558 + ... + 51082854.

It is an arithmetic number, because the mean of its divisors is an integer number (1615077387).

Almost surely, 2^66253621182 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66253621182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77523714576).

66253621182 is an abundant number, since it is smaller than the sum of its proper divisors (88793807970).

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

66253621182 is a wasteful number, since it uses less digits than its factorization.

66253621182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2195 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The spelling of 66253621182 in words is "sixty-six billion, two hundred fifty-three million, six hundred twenty-one thousand, one hundred eighty-two".