53806566 has 16 divisors (see below), whose sum is σ = 117396288. Its totient is φ = 16305000.

The previous prime is 53806559. The next prime is 53806567. The reversal of 53806566 is 66560835.

53806566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×53806566³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53806567) 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 7 ways as a sum of consecutive naturals, for example, 407560 + ... + 407691.

It is an arithmetic number, because the mean of its divisors is an integer number (7337268).

Almost surely, 2^53806566 is an apocalyptic number.

53806566 is an abundant number, since it is smaller than the sum of its proper divisors (63589722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53806566 is a wasteful number, since it uses less digits than its factorization.

53806566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815267.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 53806566 is about 7335.2959040519. The cubic root of 53806566 is about 377.5244572842.

The spelling of 53806566 in words is "fifty-three million, eight hundred six thousand, five hundred sixty-six".