66768134513485 has 16 divisors (see below), whose sum is σ = 84338966799360. Its totient is φ = 50603055393600.

The previous prime is 66768134513477. The next prime is 66768134513503. The reversal of 66768134513485 is 58431543186766.

It is not a de Polignac number, because 66768134513485 - 2³ = 66768134513477 is a prime.

It is a super-3 number, since 3×66768134513485³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66768134513485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34552660 + ... + 36433810.

It is an arithmetic number, because the mean of its divisors is an integer number (5271185424960).

Almost surely, 2^{66768134513485} is an apocalyptic number.

It is an amenable number.

66768134513485 is a deficient number, since it is larger than the sum of its proper divisors (17570832285875).

66768134513485 is a wasteful number, since it uses less digits than its factorization.

66768134513485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254788.

The product of its digits is 348364800, while the sum is 67.

The spelling of 66768134513485 in words is "sixty-six trillion, seven hundred sixty-eight billion, one hundred thirty-four million, five hundred thirteen thousand, four hundred eighty-five".