66075193837 has 4 divisors (see below), whose sum is σ = 66076917916. Its totient is φ = 66073469760.

The previous prime is 66075193829. The next prime is 66075193867. The reversal of 66075193837 is 73839157066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4426773156 + 61648420681 = 66534^2 + 248291^2 .

It is a cyclic number.

It is not a de Polignac number, because 66075193837 - 2³ = 66075193829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66075193817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803214 + ... + 881647.

It is an arithmetic number, because the mean of its divisors is an integer number (16519229479).

Almost surely, 2^66075193837 is an apocalyptic number.

It is an amenable number.

66075193837 is a deficient number, since it is larger than the sum of its proper divisors (1724079).

66075193837 is a wasteful number, since it uses less digits than its factorization.

66075193837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724078.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 66075193837 in words is "sixty-six billion, seventy-five million, one hundred ninety-three thousand, eight hundred thirty-seven".