66550710050511 has 32 divisors (see below), whose sum is σ = 91229488097280. Its totient is φ = 43122096831744.

The previous prime is 66550710050477. The next prime is 66550710050557. The reversal of 66550710050511 is 11505001705566.

It is not a de Polignac number, because 66550710050511 - 2¹¹ = 66550710048463 is a prime.

It is a super-2 number, since 2×66550710050511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66550710050581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1441935411 + ... + 1441981563.

It is an arithmetic number, because the mean of its divisors is an integer number (2850921503040).

Almost surely, 2^{66550710050511} is an apocalyptic number.

66550710050511 is a deficient number, since it is larger than the sum of its proper divisors (24678778046769).

66550710050511 is a wasteful number, since it uses less digits than its factorization.

66550710050511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59735.

The product of its (nonzero) digits is 157500, while the sum is 42.

The spelling of 66550710050511 in words is "sixty-six trillion, five hundred fifty billion, seven hundred ten million, fifty thousand, five hundred eleven".