56660244206666 has 4 divisors (see below), whose sum is σ = 84990366310002. Its totient is φ = 28330122103332.

The previous prime is 56660244206551. The next prime is 56660244206711. The reversal of 56660244206666 is 66660244206665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46838570264641 + 9821673942025 = 6843871^2 + 3133955^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165061051665 + ... + 14165061051668.

Almost surely, 2^{56660244206666} is an apocalyptic number.

56660244206666 is a deficient number, since it is larger than the sum of its proper divisors (28330122103336).

56660244206666 is a wasteful number, since it uses less digits than its factorization.

56660244206666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28330122103335.

The product of its (nonzero) digits is 89579520, while the sum is 59.

Subtracting 56660244206666 from its reverse (66660244206665), we obtain a palindrome (9999999999999).

The spelling of 56660244206666 in words is "fifty-six trillion, six hundred sixty billion, two hundred forty-four million, two hundred six thousand, six hundred sixty-six".