66434387035275 has 144 divisors (see below), whose sum is σ = 137372465528064. Its totient is φ = 30061757456640.

The previous prime is 66434387035253. The next prime is 66434387035307. The reversal of 66434387035275 is 57253078343466.

66434387035275 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 4 + 38 + 70 + 3 + 527 + 5 = 666.

66434387035275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66434387035275 - 2¹⁰ = 66434387034251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 143 ways as a sum of consecutive naturals, for example, 208306084 + ... + 208624766.

It is an arithmetic number, because the mean of its divisors is an integer number (953975455056).

Almost surely, 2^{66434387035275} is an apocalyptic number.

66434387035275 is an abundant number, since it is smaller than the sum of its proper divisors (70938078492789).

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

66434387035275 is a wasteful number, since it uses less digits than its factorization.

66434387035275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320050 (or 320042 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 63.

The spelling of 66434387035275 in words is "sixty-six trillion, four hundred thirty-four billion, three hundred eighty-seven million, thirty-five thousand, two hundred seventy-five".