2664003462565 has 4 divisors (see below), whose sum is σ = 3196804155084. Its totient is φ = 2131202770048.

The previous prime is 2664003462563. The next prime is 2664003462641. The reversal of 2664003462565 is 5652643004662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1996552044036 + 667451418529 = 1412994^2 + 816977^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664003462565 - 2¹ = 2664003462563 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664003462563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266400346252 + ... + 266400346261.

It is an arithmetic number, because the mean of its divisors is an integer number (799201038771).

Almost surely, 2^{2664003462565} is an apocalyptic number.

It is an amenable number.

2664003462565 is a deficient number, since it is larger than the sum of its proper divisors (532800692519).

2664003462565 is an equidigital number, since it uses as much as digits as its factorization.

2664003462565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532800692518.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 2664003462565 in words is "two trillion, six hundred sixty-four billion, three million, four hundred sixty-two thousand, five hundred sixty-five".