65666011545 has 12 divisors (see below), whose sum is σ = 113821086756. Its totient is φ = 35021872800.

The previous prime is 65666011519. The next prime is 65666011577. The reversal of 65666011545 is 54511066656.

It can be written as a sum of positive squares in 2 ways, for example, as 27392567049 + 38273444496 = 165507^2 + 195636^2 .

It is not a de Polignac number, because 65666011545 - 2⁵ = 65666011513 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1459244701 = 65666011545 / (6 + 5 + 6 + 6 + 6 + 0 + 1 + 1 + 5 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 65666011545.

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 11 ways as a sum of consecutive naturals, for example, 729622306 + ... + 729622395.

It is an arithmetic number, because the mean of its divisors is an integer number (9485090563).

Almost surely, 2^65666011545 is an apocalyptic number.

It is an amenable number.

65666011545 is a deficient number, since it is larger than the sum of its proper divisors (48155075211).

65666011545 is a wasteful number, since it uses less digits than its factorization.

65666011545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459244712 (or 1459244709 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 65666011545 in words is "sixty-five billion, six hundred sixty-six million, eleven thousand, five hundred forty-five".