56166653 has 4 divisors (see below), whose sum is σ = 56477148. Its totient is φ = 55856160.

The previous prime is 56166631. The next prime is 56166659. The reversal of 56166653 is 35666165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35666165 = 5 ⋅7133233.

It can be written as a sum of positive squares in 2 ways, for example, as 30228004 + 25938649 = 5498^2 + 5093^2 .

It is a cyclic number.

It is not a de Polignac number, because 56166653 - 2¹⁸ = 55904509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56166659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154976 + ... + 155337.

It is an arithmetic number, because the mean of its divisors is an integer number (14119287).

Almost surely, 2^56166653 is an apocalyptic number.

It is an amenable number.

56166653 is a deficient number, since it is larger than the sum of its proper divisors (310495).

56166653 is a wasteful number, since it uses less digits than its factorization.

56166653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310494.

The product of its digits is 97200, while the sum is 38.

The square root of 56166653 is about 7494.4414735189. The cubic root of 56166653 is about 382.9653794147.

The spelling of 56166653 in words is "fifty-six million, one hundred sixty-six thousand, six hundred fifty-three".