66537872875 has 8 divisors (see below), whose sum is σ = 83039265504. Its totient is φ = 53230298200.

The previous prime is 66537872873. The next prime is 66537872879. The reversal of 66537872875 is 57827873566.

It is not a de Polignac number, because 66537872875 - 2¹ = 66537872873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66537872873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266151367 + ... + 266151616.

It is an arithmetic number, because the mean of its divisors is an integer number (10379908188).

Almost surely, 2^66537872875 is an apocalyptic number.

66537872875 is a deficient number, since it is larger than the sum of its proper divisors (16501392629).

66537872875 is an equidigital number, since it uses as much as digits as its factorization.

66537872875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532302998 (or 532302988 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 64.

The spelling of 66537872875 in words is "sixty-six billion, five hundred thirty-seven million, eight hundred seventy-two thousand, eight hundred seventy-five".