66750144285 has 24 divisors (see below), whose sum is σ = 117391992480. Its totient is φ = 32363705440.

The previous prime is 66750144283. The next prime is 66750144287. The reversal of 66750144285 is 58244105766.

It is an interprime number because it is at equal distance from previous prime (66750144283) and next prime (66750144287).

It is not a de Polignac number, because 66750144285 - 2¹ = 66750144283 is a prime.

It is a super-2 number, since 2×66750144285² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66750144281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18386655 + ... + 18390284.

It is an arithmetic number, because the mean of its divisors is an integer number (4891333020).

Almost surely, 2^66750144285 is an apocalyptic number.

It is an amenable number.

66750144285 is a deficient number, since it is larger than the sum of its proper divisors (50641848195).

66750144285 is a wasteful number, since it uses less digits than its factorization.

66750144285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36776969 (or 36776958 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 66750144285 in words is "sixty-six billion, seven hundred fifty million, one hundred forty-four thousand, two hundred eighty-five".