66795755759766 has 48 divisors (see below), whose sum is σ = 157955597064720. Its totient is φ = 20231558645760.

The previous prime is 66795755759743. The next prime is 66795755759791.

66795755759766 is a `hidden beast` number, since 6 + 6 + 7 + 9 + 5 + 7 + 5 + 5 + 7 + 597 + 6 + 6 = 666.

66795755759766 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79409431 + ... + 80246178.

It is an arithmetic number, because the mean of its divisors is an integer number (3290741605515).

Almost surely, 2^{66795755759766} is an apocalyptic number.

66795755759766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66795755759766 is an abundant number, since it is smaller than the sum of its proper divisors (91159841304954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66795755759766 is a wasteful number, since it uses less digits than its factorization.

66795755759766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159657741 (or 159657738 counting only the distinct ones).

The product of its digits is 157529610000, while the sum is 90.

The spelling of 66795755759766 in words is "sixty-six trillion, seven hundred ninety-five billion, seven hundred fifty-five million, seven hundred fifty-nine thousand, seven hundred sixty-six".