50664561 has 16 divisors (see below), whose sum is σ = 72213120. Its totient is φ = 31518080.

The previous prime is 50664547. The next prime is 50664563. The reversal of 50664561 is 16546605.

It is a cyclic number.

It is not a de Polignac number, because 50664561 - 2⁹ = 50664049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50664563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6126 + ... + 11783.

It is an arithmetic number, because the mean of its divisors is an integer number (4513320).

Almost surely, 2^50664561 is an apocalyptic number.

It is an amenable number.

50664561 is a deficient number, since it is larger than the sum of its proper divisors (21548559).

50664561 is a wasteful number, since it uses less digits than its factorization.

50664561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17976.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 50664561 is about 7117.9042561698. The cubic root of 50664561 is about 370.0281473595.

The spelling of 50664561 in words is "fifty million, six hundred sixty-four thousand, five hundred sixty-one".