2665453663 has 4 divisors (see below), whose sum is σ = 2668269240. Its totient is φ = 2662638088.

The previous prime is 2665453657. The next prime is 2665453667. The reversal of 2665453663 is 3663545662.

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

It is a cyclic number.

It is not a de Polignac number, because 2665453663 - 2¹⁷ = 2665322591 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 (2665453667) 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, 1406368 + ... + 1408261.

It is an arithmetic number, because the mean of its divisors is an integer number (667067310).

Almost surely, 2^2665453663 is an apocalyptic number.

2665453663 is a deficient number, since it is larger than the sum of its proper divisors (2815577).

2665453663 is an equidigital number, since it uses as much as digits as its factorization.

2665453663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815576.

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

The square root of 2665453663 is about 51628.0317560141. The cubic root of 2665453663 is about 1386.5122543700.

The spelling of 2665453663 in words is "two billion, six hundred sixty-five million, four hundred fifty-three thousand, six hundred sixty-three".