66324167653 has 4 divisors (see below), whose sum is σ = 66324964428. Its totient is φ = 66323370880.

The previous prime is 66324167647. The next prime is 66324167669. The reversal of 66324167653 is 35676142366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35676142366 = 2 ⋅17838071183.

It can be written as a sum of positive squares in 2 ways, for example, as 10231929409 + 56092238244 = 101153^2 + 236838^2 .

It is a cyclic number.

It is not a de Polignac number, because 66324167653 - 2²⁹ = 65787296741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66324167597 and 66324167606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66324167633) 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, 256738 + ... + 445603.

It is an arithmetic number, because the mean of its divisors is an integer number (16581241107).

Almost surely, 2^66324167653 is an apocalyptic number.

It is an amenable number.

66324167653 is a deficient number, since it is larger than the sum of its proper divisors (796775).

66324167653 is an equidigital number, since it uses as much as digits as its factorization.

66324167653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796774.

The product of its digits is 3265920, while the sum is 49.

The spelling of 66324167653 in words is "sixty-six billion, three hundred twenty-four million, one hundred sixty-seven thousand, six hundred fifty-three".