56566005655 has 8 divisors (see below), whose sum is σ = 68835252384. Its totient is φ = 44615440800.

The previous prime is 56566005653. The next prime is 56566005679. The reversal of 56566005655 is 55650066565.

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

It is not a de Polignac number, because 56566005655 - 2¹ = 56566005653 is a prime.

It is a super-2 number, since 2×56566005655² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56566005599 and 56566005608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56566005653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79670076 + ... + 79670785.

It is an arithmetic number, because the mean of its divisors is an integer number (8604406548).

Almost surely, 2^56566005655 is an apocalyptic number.

56566005655 is a deficient number, since it is larger than the sum of its proper divisors (12269246729).

56566005655 is a wasteful number, since it uses less digits than its factorization.

56566005655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159340937.

The product of its (nonzero) digits is 4050000, while the sum is 49.

The spelling of 56566005655 in words is "fifty-six billion, five hundred sixty-six million, five thousand, six hundred fifty-five".