1665050055 has 8 divisors (see below), whose sum is σ = 2664080112. Its totient is φ = 888026688.

The previous prime is 1665050041. The next prime is 1665050071. The reversal of 1665050055 is 5500505661.

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

It is not a de Polignac number, because 1665050055 - 2⁷ = 1665049927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1665049998 and 1665050025.

It is a congruent 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, 55501654 + ... + 55501683.

It is an arithmetic number, because the mean of its divisors is an integer number (333010014).

Almost surely, 2^1665050055 is an apocalyptic number.

1665050055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1665050055 is a deficient number, since it is larger than the sum of its proper divisors (999030057).

1665050055 is a wasteful number, since it uses less digits than its factorization.

1665050055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111003345.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 1665050055 is about 40805.0248743951. The cubic root of 1665050055 is about 1185.2476364729.

The spelling of 1665050055 in words is "one billion, six hundred sixty-five million, fifty thousand, fifty-five".