66573032513 has 8 divisors (see below), whose sum is σ = 73631712168. Its totient is φ = 59791163904.

The previous prime is 66573032501. The next prime is 66573032527. The reversal of 66573032513 is 31523037566.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18919452304 + 47653580209 = 137548^2 + 218297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66573032513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66573032543) 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, 69202256 + ... + 69203217.

It is an arithmetic number, because the mean of its divisors is an integer number (9203964021).

Almost surely, 2^66573032513 is an apocalyptic number.

It is an amenable number.

66573032513 is a deficient number, since it is larger than the sum of its proper divisors (7058679655).

66573032513 is a wasteful number, since it uses less digits than its factorization.

66573032513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138405523.

The product of its (nonzero) digits is 340200, while the sum is 41.

The spelling of 66573032513 in words is "sixty-six billion, five hundred seventy-three million, thirty-two thousand, five hundred thirteen".