66443442192 has 120 divisors (see below), whose sum is σ = 196966295136. Its totient is φ = 20836666368.

The previous prime is 66443442181. The next prime is 66443442281. The reversal of 66443442192 is 29124434466.

66443442192 is a `hidden beast` number, since 66 + 443 + 44 + 21 + 92 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9560863 + ... + 9567809.

Almost surely, 2^66443442192 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 66443442192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98483147568).

66443442192 is an abundant number, since it is smaller than the sum of its proper divisors (130522852944).

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

66443442192 is a wasteful number, since it uses less digits than its factorization.

66443442192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10885 (or 10876 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The spelling of 66443442192 in words is "sixty-six billion, four hundred forty-three million, four hundred forty-two thousand, one hundred ninety-two".