56666501056066 has 48 divisors (see below), whose sum is σ = 95453141092344. Its totient is φ = 25203974400000.

The previous prime is 56666501056051. The next prime is 56666501056069. The reversal of 56666501056066 is 66065010566665.

It can be written as a sum of positive squares in 4 ways, for example, as 18294311524225 + 38372189531841 = 4277185^2 + 6194529^2 .

It is a super-2 number, since 2×56666501056066² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56666501056066.

It is not an unprimeable number, because it can be changed into a prime (56666501056069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7095685 + ... + 12793816.

Almost surely, 2^{56666501056066} is an apocalyptic number.

56666501056066 is a deficient number, since it is larger than the sum of its proper divisors (38786640036278).

56666501056066 is a wasteful number, since it uses less digits than its factorization.

56666501056066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19889779 (or 19889768 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 56666501056066 in words is "fifty-six trillion, six hundred sixty-six billion, five hundred one million, fifty-six thousand, sixty-six".