55106115566 has 4 divisors (see below), whose sum is σ = 82659173352. Its totient is φ = 27553057782.

The previous prime is 55106115563. The next prime is 55106115683. The reversal of 55106115566 is 66551160155.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55106115563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13776528890 + ... + 13776528893.

It is an arithmetic number, because the mean of its divisors is an integer number (20664793338).

Almost surely, 2^55106115566 is an apocalyptic number.

55106115566 is a deficient number, since it is larger than the sum of its proper divisors (27553057786).

55106115566 is a wasteful number, since it uses less digits than its factorization.

55106115566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27553057785.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 55106115566 in words is "fifty-five billion, one hundred six million, one hundred fifteen thousand, five hundred sixty-six".