66052506176213 has 4 divisors (see below), whose sum is σ = 66309519819180. Its totient is φ = 65795492533248.

The previous prime is 66052506176183. The next prime is 66052506176263. The reversal of 66052506176213 is 31267160525066.

It is a happy number.

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 45922944562609 + 20129561613604 = 6776647^2 + 4486598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66052506176213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66052506176263) 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, 128506821098 + ... + 128506821611.

It is an arithmetic number, because the mean of its divisors is an integer number (16577379954795).

Almost surely, 2^{66052506176213} is an apocalyptic number.

It is an amenable number.

66052506176213 is a deficient number, since it is larger than the sum of its proper divisors (257013642967).

66052506176213 is a wasteful number, since it uses less digits than its factorization.

66052506176213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257013642966.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 66052506176213 in words is "sixty-six trillion, fifty-two billion, five hundred six million, one hundred seventy-six thousand, two hundred thirteen".