65668563 has 12 divisors (see below), whose sum is σ = 98368088. Its totient is φ = 43778880.

The previous prime is 65668543. The next prime is 65668573. The reversal of 65668563 is 36586656.

65668563 is a `hidden beast` number, since 6 + 566 + 85 + 6 + 3 = 666.

It is not a de Polignac number, because 65668563 - 2⁵ = 65668531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65668543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134878 + ... + 135363.

Almost surely, 2^65668563 is an apocalyptic number.

65668563 is a deficient number, since it is larger than the sum of its proper divisors (32699525).

65668563 is an equidigital number, since it uses as much as digits as its factorization.

65668563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270256 (or 270244 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 65668563 is about 8103.6141936793. The cubic root of 65668563 is about 403.4463935640.

It can be divided in two parts, 6566 and 8563, that added together give a square (15129 = 123²).

The spelling of 65668563 in words is "sixty-five million, six hundred sixty-eight thousand, five hundred sixty-three".