63266561 has 4 divisors (see below), whose sum is σ = 66596400. Its totient is φ = 59936724.

The previous prime is 63266551. The next prime is 63266569. The reversal of 63266561 is 16566236.

63266561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63266561 - 2¹⁰ = 63265537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63266569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664891 + ... + 1664928.

It is an arithmetic number, because the mean of its divisors is an integer number (16649100).

Almost surely, 2^63266561 is an apocalyptic number.

It is an amenable number.

63266561 is a deficient number, since it is larger than the sum of its proper divisors (3329839).

63266561 is a wasteful number, since it uses less digits than its factorization.

63266561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329838.

The product of its digits is 38880, while the sum is 35.

The square root of 63266561 is about 7954.0279732976. The cubic root of 63266561 is about 398.4661276911.

The spelling of 63266561 in words is "sixty-three million, two hundred sixty-six thousand, five hundred sixty-one".