55105511666 has 8 divisors (see below), whose sum is σ = 83022401520. Its totient is φ = 27431377828.

The previous prime is 55105511663. The next prime is 55105511707. The reversal of 55105511666 is 66611550155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55105511663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60688436 + ... + 60689343.

It is an arithmetic number, because the mean of its divisors is an integer number (10377800190).

Almost surely, 2^55105511666 is an apocalyptic number.

55105511666 is a deficient number, since it is larger than the sum of its proper divisors (27916889854).

55105511666 is a wasteful number, since it uses less digits than its factorization.

55105511666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121378008.

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

The spelling of 55105511666 in words is "fifty-five billion, one hundred five million, five hundred eleven thousand, six hundred sixty-six".