66134975853 has 4 divisors (see below), whose sum is σ = 88179967808. Its totient is φ = 44089983900.

The previous prime is 66134975783. The next prime is 66134975869. The reversal of 66134975853 is 35857943166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66134975853 - 2³³ = 57545041261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66134975793 and 66134975802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66134975873) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11022495973 + ... + 11022495978.

It is an arithmetic number, because the mean of its divisors is an integer number (22044991952).

Almost surely, 2^66134975853 is an apocalyptic number.

It is an amenable number.

66134975853 is a deficient number, since it is larger than the sum of its proper divisors (22044991955).

66134975853 is a wasteful number, since it uses less digits than its factorization.

66134975853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22044991954.

The product of its digits is 16329600, while the sum is 57.

The spelling of 66134975853 in words is "sixty-six billion, one hundred thirty-four million, nine hundred seventy-five thousand, eight hundred fifty-three".