66166244312 has 64 divisors (see below), whose sum is σ = 146908857600. Its totient is φ = 27350294400.

The previous prime is 66166244311. The next prime is 66166244321. The reversal of 66166244312 is 21344266166.

It is a self number, because there is not a number n which added to its sum of digits gives 66166244312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66166244311) 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, 13814 + ... + 364037.

It is an arithmetic number, because the mean of its divisors is an integer number (2295450900).

Almost surely, 2^66166244312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66166244312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73454428800).

66166244312 is an abundant number, since it is smaller than the sum of its proper divisors (80742613288).

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

66166244312 is a wasteful number, since it uses less digits than its factorization.

66166244312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377976 (or 377972 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The spelling of 66166244312 in words is "sixty-six billion, one hundred sixty-six million, two hundred forty-four thousand, three hundred twelve".