55166005 has 4 divisors (see below), whose sum is σ = 66199212. Its totient is φ = 44132800.

The previous prime is 55165993. The next prime is 55166009. The reversal of 55166005 is 50066155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50066155 = 5 ⋅10013231.

It can be written as a sum of positive squares in 2 ways, for example, as 28879876 + 26286129 = 5374^2 + 5127^2 .

It is not a de Polignac number, because 55166005 - 2¹³ = 55157813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5516596 + ... + 5516605.

It is an arithmetic number, because the mean of its divisors is an integer number (16549803).

Almost surely, 2^55166005 is an apocalyptic number.

It is an amenable number.

55166005 is a deficient number, since it is larger than the sum of its proper divisors (11033207).

55166005 is a wasteful number, since it uses less digits than its factorization.

55166005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11033206.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 55166005 is about 7427.3821094649. The cubic root of 55166005 is about 380.6774733681.

The spelling of 55166005 in words is "fifty-five million, one hundred sixty-six thousand, five".