66190403712 has 128 divisors (see below), whose sum is σ = 177898412160. Its totient is φ = 21803139072.

The previous prime is 66190403701. The next prime is 66190403717. The reversal of 66190403712 is 21730409166.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (66190403717) 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, 45553578 + ... + 45555030.

It is an arithmetic number, because the mean of its divisors is an integer number (1389831345).

Almost surely, 2^66190403712 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 66190403712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88949206080).

66190403712 is an abundant number, since it is smaller than the sum of its proper divisors (111708008448).

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

66190403712 is a wasteful number, since it uses less digits than its factorization.

66190403712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790 (or 2778 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 66190403712 in words is "sixty-six billion, one hundred ninety million, four hundred three thousand, seven hundred twelve".