66346375875 has 32 divisors (see below), whose sum is σ = 118892714304. Its totient is φ = 32662828800.

The previous prime is 66346375873. The next prime is 66346375913. The reversal of 66346375875 is 57857364366.

It is not a de Polignac number, because 66346375875 - 2¹ = 66346375873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66346375873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6799882 + ... + 6809631.

It is an arithmetic number, because the mean of its divisors is an integer number (3715397322).

Almost surely, 2^66346375875 is an apocalyptic number.

66346375875 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66346375875 is a deficient number, since it is larger than the sum of its proper divisors (52546338429).

66346375875 is a wasteful number, since it uses less digits than its factorization.

66346375875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13609544 (or 13609534 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 60.

The spelling of 66346375875 in words is "sixty-six billion, three hundred forty-six million, three hundred seventy-five thousand, eight hundred seventy-five".