55666667889 has 24 divisors (see below), whose sum is σ = 91900382912. Its totient is φ = 31807378080.

The previous prime is 55666667873. The next prime is 55666667911. The reversal of 55666667889 is 98876666655.

It is not a de Polignac number, because 55666667889 - 2⁴ = 55666667873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55666667839) 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, 1719042 + ... + 1751124.

Almost surely, 2^55666667889 is an apocalyptic number.

It is an amenable number.

55666667889 is a deficient number, since it is larger than the sum of its proper divisors (36233715023).

55666667889 is a wasteful number, since it uses less digits than its factorization.

55666667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59637 (or 59634 counting only the distinct ones).

The product of its digits is 783820800, while the sum is 72.

The spelling of 55666667889 in words is "fifty-five billion, six hundred sixty-six million, six hundred sixty-seven thousand, eight hundred eighty-nine".