66016255620016 has 20 divisors (see below), whose sum is σ = 137745456438352. Its totient is φ = 30469041055296.

The previous prime is 66016255619957. The next prime is 66016255620019. The reversal of 66016255620016 is 61002655261066.

It is not an unprimeable number, because it can be changed into a prime (66016255620019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158692921956 + ... + 158692922371.

Almost surely, 2^{66016255620016} is an apocalyptic number.

It is an amenable number.

66016255620016 is an abundant number, since it is smaller than the sum of its proper divisors (71729200818336).

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

66016255620016 is a wasteful number, since it uses less digits than its factorization.

66016255620016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317385844348 (or 317385844342 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 66016255620016 in words is "sixty-six trillion, sixteen billion, two hundred fifty-five million, six hundred twenty thousand, sixteen".