66530216517222 has 32 divisors (see below), whose sum is σ = 134651545668864. Its totient is φ = 21912447788000.

The previous prime is 66530216517203. The next prime is 66530216517223. The reversal of 66530216517222 is 22271561203566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66530216517223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111500658 + ... + 112095749.

It is an arithmetic number, because the mean of its divisors is an integer number (4207860802152).

Almost surely, 2^{66530216517222} is an apocalyptic number.

66530216517222 is an abundant number, since it is smaller than the sum of its proper divisors (68121329151642).

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

66530216517222 is a wasteful number, since it uses less digits than its factorization.

66530216517222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223597004.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 66530216517222 in words is "sixty-six trillion, five hundred thirty billion, two hundred sixteen million, five hundred seventeen thousand, two hundred twenty-two".