66135330553243 has 8 divisors (see below), whose sum is σ = 78189553363680. Its totient is φ = 54732687354240.

The previous prime is 66135330553079. The next prime is 66135330553319. The reversal of 66135330553243 is 34235503353166.

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

It is a de Polignac number, because none of the positive numbers 2^k-66135330553243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66135330551243) 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, 162894902638 + ... + 162894903043.

It is an arithmetic number, because the mean of its divisors is an integer number (9773694170460).

Almost surely, 2^{66135330553243} is an apocalyptic number.

66135330553243 is a deficient number, since it is larger than the sum of its proper divisors (12054222810437).

66135330553243 is a wasteful number, since it uses less digits than its factorization.

66135330553243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325789805717.

The product of its (nonzero) digits is 8748000, while the sum is 49.

The spelling of 66135330553243 in words is "sixty-six trillion, one hundred thirty-five billion, three hundred thirty million, five hundred fifty-three thousand, two hundred forty-three".