66038491116 has 72 divisors (see below), whose sum is σ = 180201031920. Its totient is φ = 20270980224.

The previous prime is 66038491111. The next prime is 66038491157. The reversal of 66038491116 is 61119483066.

It is a super-2 number, since 2×66038491116² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66038491111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27706 + ... + 364478.

It is an arithmetic number, because the mean of its divisors is an integer number (2502792110).

Almost surely, 2^66038491116 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 66038491116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90100515960).

66038491116 is an abundant number, since it is smaller than the sum of its proper divisors (114162540804).

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

66038491116 is a wasteful number, since it uses less digits than its factorization.

66038491116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337215 (or 337210 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 66038491116 in words is "sixty-six billion, thirty-eight million, four hundred ninety-one thousand, one hundred sixteen".