56666666666 has 4 divisors (see below), whose sum is σ = 85000000002. Its totient is φ = 28333333332.

The previous prime is 56666666657. The next prime is 56666666669. The reversal of 56666666666 is 66666666665.

56666666666 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.

It can be written as a sum of positive squares in only one way, i.e., 56627341225 + 39325441 = 237965^2 + 6271^2 .

It is a super-2 number, since 2×56666666666² (a number of 22 digits) contains 22 as substring.

56666666666 is a modest number, since divided by 666666 gives 56666 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (56666666669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14166666665 + ... + 14166666668.

Almost surely, 2^56666666666 is an apocalyptic number.

56666666666 is a deficient number, since it is larger than the sum of its proper divisors (28333333336).

56666666666 is a wasteful number, since it uses less digits than its factorization.

56666666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28333333335.

The product of its digits is 302330880, while the sum is 65.

Subtracting 56666666666 from its reverse (66666666665), we obtain a palindrome (9999999999).

The spelling of 56666666666 in words is "fifty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".