66016514560779 has 12 divisors (see below), whose sum is σ = 99503152381776. Its totient is φ = 42097487545872.

The previous prime is 66016514560771. The next prime is 66016514560781. The reversal of 66016514560779 is 97706541561066.

It is a happy number.

66016514560779 is a `hidden beast` number, since 6 + 6 + 0 + 1 + 6 + 5 + 14 + 5 + 607 + 7 + 9 = 666.

It is not a de Polignac number, because 66016514560779 - 2³ = 66016514560771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66016514560771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159460179892 + ... + 159460180305.

It is an arithmetic number, because the mean of its divisors is an integer number (8291929365148).

Almost surely, 2^{66016514560779} is an apocalyptic number.

66016514560779 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

66016514560779 is a deficient number, since it is larger than the sum of its proper divisors (33486637820997).

66016514560779 is a wasteful number, since it uses less digits than its factorization.

66016514560779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318920360226 (or 318920360223 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 66016514560779 in words is "sixty-six trillion, sixteen billion, five hundred fourteen million, five hundred sixty thousand, seven hundred seventy-nine".