56666666667 has 16 divisors (see below), whose sum is σ = 81529314048. Its totient is φ = 34802455200.

The previous prime is 56666666657. The next prime is 56666666669. The reversal of 56666666667 is 76666666665.

It is not a de Polignac number, because 56666666667 - 2¹² = 56666662571 is a prime.

It is a super-2 number, since 2×56666666667² (a number of 22 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 56666666598 and 56666666607.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1424709 + ... + 1463942.

It is an arithmetic number, because the mean of its divisors is an integer number (5095582128).

Almost surely, 2^56666666667 is an apocalyptic number.

56666666667 is a deficient number, since it is larger than the sum of its proper divisors (24862647381).

56666666667 is a wasteful number, since it uses less digits than its factorization.

56666666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889170.

The product of its digits is 352719360, while the sum is 66.

The spelling of 56666666667 in words is "fifty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-seven".