66342725798048 has 144 divisors (see below), whose sum is σ = 153551895293160. Its totient is φ = 28130522628096.

The previous prime is 66342725797987. The next prime is 66342725798093. The reversal of 66342725798048 is 84089752724366.

It can be written as a sum of positive squares in 4 ways, for example, as 65290730951824 + 1051994846224 = 8080268^2 + 1025668^2 .

It is a super-2 number, since 2×66342725798048² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489225038 + ... + 489360626.

Almost surely, 2^{66342725798048} 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 66342725798048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76775947646580).

66342725798048 is an abundant number, since it is smaller than the sum of its proper divisors (87209169495112).

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

66342725798048 is a wasteful number, since it uses less digits than its factorization.

66342725798048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138927 (or 138912 counting only the distinct ones).

The product of its (nonzero) digits is 975421440, while the sum is 71.

The spelling of 66342725798048 in words is "sixty-six trillion, three hundred forty-two billion, seven hundred twenty-five million, seven hundred ninety-eight thousand, forty-eight".