66155165050 has 48 divisors (see below), whose sum is σ = 132623308440. Its totient is φ = 24406352640.

The previous prime is 66155165047. The next prime is 66155165099. The reversal of 66155165050 is 5056155166.

It can be written as a sum of positive squares in 12 ways, for example, as 15728420569 + 50426744481 = 125413^2 + 224559^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66155164994 and 66155165012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 757444 + ... + 840256.

Almost surely, 2^66155165050 is an apocalyptic number.

66155165050 is an abundant number, since it is smaller than the sum of its proper divisors (66468143390).

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

66155165050 is a wasteful number, since it uses less digits than its factorization.

66155165050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84067 (or 84062 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 66155165050 in words is "sixty-six billion, one hundred fifty-five million, one hundred sixty-five thousand, fifty".