66364652543 has 16 divisors (see below), whose sum is σ = 76321104384. Its totient is φ = 56527342560.

The previous prime is 66364652539. The next prime is 66364652551. The reversal of 66364652543 is 34525646366.

It is a cyclic number.

It is not a de Polignac number, because 66364652543 - 2² = 66364652539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66364652491 and 66364652500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66364652143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6104933 + ... + 6115793.

It is an arithmetic number, because the mean of its divisors is an integer number (4770069024).

Almost surely, 2^66364652543 is an apocalyptic number.

66364652543 is a deficient number, since it is larger than the sum of its proper divisors (9956451841).

66364652543 is a wasteful number, since it uses less digits than its factorization.

66364652543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16262.

The product of its digits is 9331200, while the sum is 50.

The spelling of 66364652543 in words is "sixty-six billion, three hundred sixty-four million, six hundred fifty-two thousand, five hundred forty-three".