2565346663 has 8 divisors (see below), whose sum is σ = 2806492176. Its totient is φ = 2325523200.

The previous prime is 2565346657. The next prime is 2565346673. The reversal of 2565346663 is 3666435652.

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

It is not a de Polignac number, because 2565346663 - 2¹⁷ = 2565215591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565346603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326448 + ... + 334213.

It is an arithmetic number, because the mean of its divisors is an integer number (350811522).

Almost surely, 2^2565346663 is an apocalyptic number.

2565346663 is a deficient number, since it is larger than the sum of its proper divisors (241145513).

2565346663 is a wasteful number, since it uses less digits than its factorization.

2565346663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661025.

The product of its digits is 2332800, while the sum is 46.

The square root of 2565346663 is about 50649.2513567575. The cubic root of 2565346663 is about 1368.9324560454.

The spelling of 2565346663 in words is "two billion, five hundred sixty-five million, three hundred forty-six thousand, six hundred sixty-three".