55661665105 has 8 divisors (see below), whose sum is σ = 66845744064. Its totient is φ = 44494834800.

The previous prime is 55661665097. The next prime is 55661665123. The reversal of 55661665105 is 50156616655.

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

It is not a de Polignac number, because 55661665105 - 2³ = 55661665097 is a prime.

It is a super-2 number, since 2×55661665105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4305061 + ... + 4317970.

It is an arithmetic number, because the mean of its divisors is an integer number (8355718008).

Almost surely, 2^55661665105 is an apocalyptic number.

It is an amenable number.

55661665105 is a deficient number, since it is larger than the sum of its proper divisors (11184078959).

55661665105 is a wasteful number, since it uses less digits than its factorization.

55661665105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8624327.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 55661665105 in words is "fifty-five billion, six hundred sixty-one million, six hundred sixty-five thousand, one hundred five".