66885495279072 has 192 divisors, whose sum is σ = 181044498539520. Its totient is φ = 21608197222400.

The previous prime is 66885495279067. The next prime is 66885495279077. The reversal of 66885495279072 is 27097259458866.

It is an interprime number because it is at equal distance from previous prime (66885495279067) and next prime (66885495279077).

It is a super-2 number, since 2×66885495279072² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66885495279077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371535322 + ... + 371715302.

It is an arithmetic number, because the mean of its divisors is an integer number (942940096560).

Almost surely, 2^{66885495279072} 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 66885495279072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90522249269760).

66885495279072 is an abundant number, since it is smaller than the sum of its proper divisors (114159003260448).

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

66885495279072 is a wasteful number, since it uses less digits than its factorization.

66885495279072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180657 (or 180649 counting only the distinct ones).

The product of its (nonzero) digits is 3657830400, while the sum is 78.

The spelling of 66885495279072 in words is "sixty-six trillion, eight hundred eighty-five billion, four hundred ninety-five million, two hundred seventy-nine thousand, seventy-two".