55066355563165 has 4 divisors (see below), whose sum is σ = 66079626675804. Its totient is φ = 44053084450528.

The previous prime is 55066355563159. The next prime is 55066355563181. The reversal of 55066355563165 is 56136555366055.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32638951728601 + 22427403834564 = 5713051^2 + 4735758^2 .

It is a cyclic number.

It is not a de Polignac number, because 55066355563165 - 2⁹ = 55066355562653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5506635556312 + ... + 5506635556321.

It is an arithmetic number, because the mean of its divisors is an integer number (16519906668951).

Almost surely, 2^{55066355563165} is an apocalyptic number.

It is an amenable number.

55066355563165 is a deficient number, since it is larger than the sum of its proper divisors (11013271112639).

55066355563165 is a wasteful number, since it uses less digits than its factorization.

55066355563165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11013271112638.

The product of its (nonzero) digits is 182250000, while the sum is 61.

The spelling of 55066355563165 in words is "fifty-five trillion, sixty-six billion, three hundred fifty-five million, five hundred sixty-three thousand, one hundred sixty-five".