66166276344 has 128 divisors (see below), whose sum is σ = 195785510400. Its totient is φ = 18232220160.

The previous prime is 66166276339. The next prime is 66166276357. The reversal of 66166276344 is 44367266166.

It is a super-2 number, since 2×66166276344² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4606614 + ... + 4620954.

It is an arithmetic number, because the mean of its divisors is an integer number (1529574300).

Almost surely, 2^66166276344 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 66166276344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97892755200).

66166276344 is an abundant number, since it is smaller than the sum of its proper divisors (129619234056).

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

66166276344 is a wasteful number, since it uses less digits than its factorization.

66166276344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15333 (or 15329 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 51.

The spelling of 66166276344 in words is "sixty-six billion, one hundred sixty-six million, two hundred seventy-six thousand, three hundred forty-four".