55005026666 has 4 divisors (see below), whose sum is σ = 82507540002. Its totient is φ = 27502513332.

The previous prime is 55005026647. The next prime is 55005026701. The reversal of 55005026666 is 66662050055.

55005026666 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, and also an emirpimes, since its reverse is a distinct semiprime: 66662050055 = 5 ⋅13332410011.

It can be written as a sum of positive squares in only one way, i.e., 42219975625 + 12785051041 = 205475^2 + 113071^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13751256665 + ... + 13751256668.

Almost surely, 2^55005026666 is an apocalyptic number.

55005026666 is a deficient number, since it is larger than the sum of its proper divisors (27502513336).

55005026666 is a wasteful number, since it uses less digits than its factorization.

55005026666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27502513335.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 55005026666 in words is "fifty-five billion, five million, twenty-six thousand, six hundred sixty-six".