66247195037 has 4 divisors (see below), whose sum is σ = 66247717116. Its totient is φ = 66246672960.

The previous prime is 66247195009. The next prime is 66247195061. The reversal of 66247195037 is 73059174266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 51091369156 + 15155825881 = 226034^2 + 123109^2 .

It is a cyclic number.

It is not a de Polignac number, because 66247195037 - 2¹⁸ = 66246932893 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 (66247195237) 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, 65237 + ... + 369797.

It is an arithmetic number, because the mean of its divisors is an integer number (16561929279).

Almost surely, 2^66247195037 is an apocalyptic number.

It is an amenable number.

66247195037 is a deficient number, since it is larger than the sum of its proper divisors (522079).

66247195037 is a wasteful number, since it uses less digits than its factorization.

66247195037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522078.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 66247195037 in words is "sixty-six billion, two hundred forty-seven million, one hundred ninety-five thousand, thirty-seven".