2664656065 has 8 divisors (see below), whose sum is σ = 3204526248. Its totient is φ = 2127098880.

The previous prime is 2664655991. The next prime is 2664656077. The reversal of 2664656065 is 5606564662.

It can be written as a sum of positive squares in 4 ways, for example, as 23107249 + 2641548816 = 4807^2 + 51396^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2664656065 - 2⁷ = 2664655937 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 575712 + ... + 580321.

It is an arithmetic number, because the mean of its divisors is an integer number (400565781).

Almost surely, 2^2664656065 is an apocalyptic number.

It is an amenable number.

2664656065 is a deficient number, since it is larger than the sum of its proper divisors (539870183).

2664656065 is a wasteful number, since it uses less digits than its factorization.

2664656065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156499.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The square root of 2664656065 is about 51620.3067116033. The cubic root of 2664656065 is about 1386.3739427397.

The spelling of 2664656065 in words is "two billion, six hundred sixty-four million, six hundred fifty-six thousand, sixty-five".