66160909775 has 6 divisors (see below), whose sum is σ = 82039528152. Its totient is φ = 52928727800.

The previous prime is 66160909751. The next prime is 66160909799. The reversal of 66160909775 is 57790906166.

It is an interprime number because it is at equal distance from previous prime (66160909751) and next prime (66160909799).

It is not a de Polignac number, because 66160909775 - 2¹⁴ = 66160893391 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 66160909775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1323218171 + ... + 1323218220.

It is an arithmetic number, because the mean of its divisors is an integer number (13673254692).

Almost surely, 2^66160909775 is an apocalyptic number.

66160909775 is a deficient number, since it is larger than the sum of its proper divisors (15878618377).

66160909775 is a wasteful number, since it uses less digits than its factorization.

66160909775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646436401 (or 2646436396 counting only the distinct ones).

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 66160909775 in words is "sixty-six billion, one hundred sixty million, nine hundred nine thousand, seven hundred seventy-five".