66541262305 has 12 divisors (see below), whose sum is σ = 92886170580. Its totient is φ = 45628293984.

The previous prime is 66541262287. The next prime is 66541262309. The reversal of 66541262305 is 50326214566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27585555921 + 38955706384 = 166089^2 + 197372^2 .

It is not a de Polignac number, because 66541262305 - 2⁵ = 66541262273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66541262309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135798250 + ... + 135798739.

It is an arithmetic number, because the mean of its divisors is an integer number (7740514215).

Almost surely, 2^66541262305 is an apocalyptic number.

It is an amenable number.

66541262305 is a deficient number, since it is larger than the sum of its proper divisors (26344908275).

66541262305 is a wasteful number, since it uses less digits than its factorization.

66541262305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271597008 (or 271597001 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 66541262305 in words is "sixty-six billion, five hundred forty-one million, two hundred sixty-two thousand, three hundred five".