66138063823335 has 128 divisors (see below), whose sum is σ = 127768710610944. Its totient is φ = 28575347258880.

The previous prime is 66138063823319. The next prime is 66138063823373. The reversal of 66138063823335 is 53332836083166.

It is not a de Polignac number, because 66138063823335 - 2⁴ = 66138063823319 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70981129 + ... + 71906861.

It is an arithmetic number, because the mean of its divisors is an integer number (998193051648).

Almost surely, 2^{66138063823335} is an apocalyptic number.

66138063823335 is a deficient number, since it is larger than the sum of its proper divisors (61630646787609).

66138063823335 is a wasteful number, since it uses less digits than its factorization.

66138063823335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926293.

The product of its (nonzero) digits is 33592320, while the sum is 57.

The spelling of 66138063823335 in words is "sixty-six trillion, one hundred thirty-eight billion, sixty-three million, eight hundred twenty-three thousand, three hundred thirty-five".