66155066665516 has 12 divisors (see below), whose sum is σ = 115772080929232. Its totient is φ = 33077329257168.

The previous prime is 66155066665463. The next prime is 66155066665517. The reversal of 66155066665516 is 61556666055166.

It is not an unprimeable number, because it can be changed into a prime (66155066665517) 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, 50288355 + ... + 51587098.

Almost surely, 2^{66155066665516} is an apocalyptic number.

It is an amenable number.

66155066665516 is a deficient number, since it is larger than the sum of its proper divisors (49617014263716).

66155066665516 is a wasteful number, since it uses less digits than its factorization.

66155066665516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102037800 (or 102037798 counting only the distinct ones).

The product of its (nonzero) digits is 174960000, while the sum is 64.

The spelling of 66155066665516 in words is "sixty-six trillion, one hundred fifty-five billion, sixty-six million, six hundred sixty-five thousand, five hundred sixteen".