66905319012216 has 64 divisors (see below), whose sum is σ = 167322663357600. Its totient is φ = 22293858521088.

The previous prime is 66905319012209. The next prime is 66905319012263. The reversal of 66905319012216 is 61221091350966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2147620896 + ... + 2147652048.

Almost surely, 2^{66905319012216} is an apocalyptic number.

It is an amenable number.

66905319012216 is an abundant number, since it is smaller than the sum of its proper divisors (100417344345384).

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

66905319012216 is a wasteful number, since it uses less digits than its factorization.

66905319012216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60048 (or 60044 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 66905319012216 in words is "sixty-six trillion, nine hundred five billion, three hundred nineteen million, twelve thousand, two hundred sixteen".