66282175765 has 16 divisors (see below), whose sum is σ = 86091789168. Its totient is φ = 48698366976.

The previous prime is 66282175759. The next prime is 66282175781. The reversal of 66282175765 is 56757128266.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4846108996 + 61436066769 = 69614^2 + 247863^2 .

It is a cyclic number.

It is not a de Polignac number, because 66282175765 - 2²³ = 66273787157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2575332 + ... + 2600941.

It is an arithmetic number, because the mean of its divisors is an integer number (5380736823).

Almost surely, 2^66282175765 is an apocalyptic number.

66282175765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66282175765 is a deficient number, since it is larger than the sum of its proper divisors (19809613403).

66282175765 is a wasteful number, since it uses less digits than its factorization.

66282175765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5176488.

The product of its digits is 8467200, while the sum is 55.

The spelling of 66282175765 in words is "sixty-six billion, two hundred eighty-two million, one hundred seventy-five thousand, seven hundred sixty-five".