56156566 has 4 divisors (see below), whose sum is σ = 84234852. Its totient is φ = 28078282.

The previous prime is 56156563. The next prime is 56156567. The reversal of 56156566 is 66565165.

56156566 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 an emirpimes, since its reverse is a distinct semiprime: 66565165 = 5 ⋅13313033.

It is a super-3 number, since 3×56156566³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56156563) 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 as a sum of consecutive naturals, namely, 14039140 + ... + 14039143.

It is an arithmetic number, because the mean of its divisors is an integer number (21058713).

Almost surely, 2^56156566 is an apocalyptic number.

56156566 is a deficient number, since it is larger than the sum of its proper divisors (28078286).

56156566 is a wasteful number, since it uses less digits than its factorization.

56156566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28078285.

The product of its digits is 162000, while the sum is 40.

The square root of 56156566 is about 7493.7684778755. The cubic root of 56156566 is about 382.9424523880.

The spelling of 56156566 in words is "fifty-six million, one hundred fifty-six thousand, five hundred sixty-six".