2660164065 has 64 divisors (see below), whose sum is σ = 5361081600. Its totient is φ = 1240676352.

The previous prime is 2660164057. The next prime is 2660164123. The reversal of 2660164065 is 5604610662.

It is a happy number.

2660164065 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 1 + 640 + 6 + 5 = 666.

It is not a de Polignac number, because 2660164065 - 2³ = 2660164057 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6544 + ... + 73233.

It is an arithmetic number, because the mean of its divisors is an integer number (83766900).

Almost surely, 2^2660164065 is an apocalyptic number.

It is an amenable number.

2660164065 is an abundant number, since it is smaller than the sum of its proper divisors (2700917535).

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

2660164065 is a wasteful number, since it uses less digits than its factorization.

2660164065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79823 (or 79817 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2660164065 is about 51576.7783503390. The cubic root of 2660164065 is about 1385.5944682270.

The spelling of 2660164065 in words is "two billion, six hundred sixty million, one hundred sixty-four thousand, sixty-five".