66768517483 has 16 divisors (see below), whose sum is σ = 69873868800. Its totient is φ = 63680268960.

The previous prime is 66768517477. The next prime is 66768517489. The reversal of 66768517483 is 38471586766.

It is an interprime number because it is at equal distance from previous prime (66768517477) and next prime (66768517489).

It is a cyclic number.

It is not a de Polignac number, because 66768517483 - 2²⁵ = 66734963051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66768517489) by changing a digit.

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, 24996238 + ... + 24998908.

It is an arithmetic number, because the mean of its divisors is an integer number (4367116800).

Almost surely, 2^66768517483 is an apocalyptic number.

66768517483 is a deficient number, since it is larger than the sum of its proper divisors (3105351317).

66768517483 is a wasteful number, since it uses less digits than its factorization.

66768517483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5442.

The product of its digits is 40642560, while the sum is 61.

The spelling of 66768517483 in words is "sixty-six billion, seven hundred sixty-eight million, five hundred seventeen thousand, four hundred eighty-three".