56661100060555 has 16 divisors (see below), whose sum is σ = 73213146246240. Its totient is φ = 41939382533632.

The previous prime is 56661100060553. The next prime is 56661100060583. The reversal of 56661100060555 is 55506000116665.

It is a cyclic number.

It is not a de Polignac number, because 56661100060555 - 2¹ = 56661100060553 is a prime.

It is a super-3 number, since 3×56661100060555³ (a number of 42 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (56661100060553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5649157504 + ... + 5649167533.

It is an arithmetic number, because the mean of its divisors is an integer number (4575821640390).

Almost surely, 2^{56661100060555} is an apocalyptic number.

56661100060555 is a deficient number, since it is larger than the sum of its proper divisors (16552046185685).

56661100060555 is a wasteful number, since it uses less digits than its factorization.

56661100060555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11298325118.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 56661100060555 in words is "fifty-six trillion, six hundred sixty-one billion, one hundred million, sixty thousand, five hundred fifty-five".