667560563 has 4 divisors (see below), whose sum is σ = 667814280. Its totient is φ = 667306848.

The previous prime is 667560557. The next prime is 667560571. The reversal of 667560563 is 365065766.

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 667560563 - 2²² = 663366259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667560503) 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, 122870 + ... + 128187.

It is an arithmetic number, because the mean of its divisors is an integer number (166953570).

Almost surely, 2^667560563 is an apocalyptic number.

667560563 is a deficient number, since it is larger than the sum of its proper divisors (253717).

667560563 is a wasteful number, since it uses less digits than its factorization.

667560563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253716.

The product of its (nonzero) digits is 680400, while the sum is 44.

The square root of 667560563 is about 25837.1934040832. The cubic root of 667560563 is about 873.9707355446.

The spelling of 667560563 in words is "six hundred sixty-seven million, five hundred sixty thousand, five hundred sixty-three".