66757313563 has 16 divisors (see below), whose sum is σ = 67986521856. Its totient is φ = 65536742880.

The previous prime is 66757313543. The next prime is 66757313587. The reversal of 66757313563 is 36531375766.

66757313563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66757313563 - 2¹⁷ = 66757182491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66757313563.

It is not an unprimeable number, because it can be changed into a prime (66757313543) 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, 20840520 + ... + 20843722.

It is an arithmetic number, because the mean of its divisors is an integer number (4249157616).

Almost surely, 2^66757313563 is an apocalyptic number.

66757313563 is a deficient number, since it is larger than the sum of its proper divisors (1229208293).

66757313563 is a wasteful number, since it uses less digits than its factorization.

66757313563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4434.

The product of its digits is 7144200, while the sum is 52.

The spelling of 66757313563 in words is "sixty-six billion, seven hundred fifty-seven million, three hundred thirteen thousand, five hundred sixty-three".