2664506612565 has 80 divisors (see below), whose sum is σ = 5746014933120. Its totient is φ = 1153951712640.

The previous prime is 2664506612557. The next prime is 2664506612693. The reversal of 2664506612565 is 5652166054662.

It is a happy number.

2664506612565 is a `hidden beast` number, since 2 + 6 + 6 + 4 + 5 + 0 + 66 + 12 + 565 = 666.

2664506612565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2664506612565 - 2³ = 2664506612557 is a prime.

It is a super-2 number, since 2×2664506612565² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24679326 + ... + 24787055.

It is an arithmetic number, because the mean of its divisors is an integer number (71825186664).

Almost surely, 2^{2664506612565} is an apocalyptic number.

It is an amenable number.

2664506612565 is an abundant number, since it is smaller than the sum of its proper divisors (3081508320555).

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

2664506612565 is a wasteful number, since it uses less digits than its factorization.

2664506612565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49466424 (or 49466415 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 2664506612565 in words is "two trillion, six hundred sixty-four billion, five hundred six million, six hundred twelve thousand, five hundred sixty-five".