667565612563 has 2 divisors, whose sum is σ = 667565612564. Its totient is φ = 667565612562.

The previous prime is 667565612501. The next prime is 667565612603. The reversal of 667565612563 is 365216565766.

667565612563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667565612563 is a prime.

It is a super-2 number, since 2×667565612563² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667565612498 and 667565612507.

It is not a weakly prime, because it can be changed into another prime (667565612863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333782806281 + 333782806282.

It is an arithmetic number, because the mean of its divisors is an integer number (333782806282).

Almost surely, 2^667565612563 is an apocalyptic number.

667565612563 is a deficient number, since it is larger than the sum of its proper divisors (1).

667565612563 is an equidigital number, since it uses as much as digits as its factorization.

667565612563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824000, while the sum is 58.

The spelling of 667565612563 in words is "six hundred sixty-seven billion, five hundred sixty-five million, six hundred twelve thousand, five hundred sixty-three".