66512062022166 has 96 divisors (see below), whose sum is σ = 154755255283200. Its totient is φ = 20570021364480.

The previous prime is 66512062022143. The next prime is 66512062022171. The reversal of 66512062022166 is 66122026021566.

66512062022166 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 2 + 0 + 620 + 2 + 2 + 16 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174464905 + ... + 174845723.

It is an arithmetic number, because the mean of its divisors is an integer number (1612033909200).

Almost surely, 2^{66512062022166} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66512062022166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77377627641600).

66512062022166 is an abundant number, since it is smaller than the sum of its proper divisors (88243193261034).

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

66512062022166 is a wasteful number, since it uses less digits than its factorization.

66512062022166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388954 (or 388951 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 66512062022166 in words is "sixty-six trillion, five hundred twelve billion, sixty-two million, twenty-two thousand, one hundred sixty-six".