53566665 has 8 divisors (see below), whose sum is σ = 85706688. Its totient is φ = 28568880.

The previous prime is 53566657. The next prime is 53566679. The reversal of 53566665 is 56666535.

53566665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53566665 - 2³ = 53566657 is a prime.

It is an unprimeable number.

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, 1785541 + ... + 1785570.

It is an arithmetic number, because the mean of its divisors is an integer number (10713336).

Almost surely, 2^53566665 is an apocalyptic number.

It is an amenable number.

53566665 is a deficient number, since it is larger than the sum of its proper divisors (32140023).

53566665 is a wasteful number, since it uses less digits than its factorization.

53566665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571119.

The product of its digits is 486000, while the sum is 42.

The square root of 53566665 is about 7318.9251260004. The cubic root of 53566665 is about 376.9625467323.

It can be divided in two parts, 5356 and 6665, that added together give a palindrome (12021).

The spelling of 53566665 in words is "fifty-three million, five hundred sixty-six thousand, six hundred sixty-five".