66016255620069 has 8 divisors (see below), whose sum is σ = 97801860177920. Its totient is φ = 44010837080028.

The previous prime is 66016255620067. The next prime is 66016255620097. The reversal of 66016255620069 is 96002655261066.

It is a happy number.

66016255620069 is a `hidden beast` number, since 6 + 6 + 0 + 1 + 6 + 2 + 5 + 5 + 620 + 0 + 6 + 9 = 666.

It is not a de Polignac number, because 66016255620069 - 2¹ = 66016255620067 is a prime.

It is a super-2 number, since 2×66016255620069² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66016255619997 and 66016255620024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66016255620067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222523252197 + ... + 1222523252250.

It is an arithmetic number, because the mean of its divisors is an integer number (12225232522240).

Almost surely, 2^{66016255620069} is an apocalyptic number.

It is an amenable number.

66016255620069 is a deficient number, since it is larger than the sum of its proper divisors (31785604557851).

66016255620069 is a wasteful number, since it uses less digits than its factorization.

66016255620069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445046504456 (or 2445046504450 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 66016255620069 in words is "sixty-six trillion, sixteen billion, two hundred fifty-five million, six hundred twenty thousand, sixty-nine".