66142375563250 has 192 divisors, whose sum is σ = 146820690862560. Its totient is φ = 22239008064000.

The previous prime is 66142375563221. The next prime is 66142375563331. The reversal of 66142375563250 is 5236557324166.

It can be written as a sum of positive squares in 16 ways, for example, as 553903597009 + 65588471966241 = 744247^2 + 8098671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66142375563191 and 66142375563200.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1441961316 + ... + 1442007184.

Almost surely, 2^{66142375563250} is an apocalyptic number.

66142375563250 is an abundant number, since it is smaller than the sum of its proper divisors (80678315299310).

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

66142375563250 is a wasteful number, since it uses less digits than its factorization.

66142375563250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48174 (or 48157 counting only the distinct ones).

The product of its (nonzero) digits is 27216000, while the sum is 55.

The spelling of 66142375563250 in words is "sixty-six trillion, one hundred forty-two billion, three hundred seventy-five million, five hundred sixty-three thousand, two hundred fifty".