55660061665 has 8 divisors (see below), whose sum is σ = 71929925928. Its totient is φ = 41102814720.

The previous prime is 55660061623. The next prime is 55660061671. The reversal of 55660061665 is 56616006655.

It can be written as a sum of positive squares in 4 ways, for example, as 3435014881 + 52225046784 = 58609^2 + 228528^2 .

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

It is not a de Polignac number, because 55660061665 - 2¹¹ = 55660059617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428154256 + ... + 428154385.

It is an arithmetic number, because the mean of its divisors is an integer number (8991240741).

Almost surely, 2^55660061665 is an apocalyptic number.

It is an amenable number.

55660061665 is a deficient number, since it is larger than the sum of its proper divisors (16269864263).

55660061665 is a wasteful number, since it uses less digits than its factorization.

55660061665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856308659.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 55660061665 in words is "fifty-five billion, six hundred sixty million, sixty-one thousand, six hundred sixty-five".