555166505 has 4 divisors (see below), whose sum is σ = 666199812. Its totient is φ = 444133200.

The previous prime is 555166487. The next prime is 555166511. The reversal of 555166505 is 505661555.

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 188980009 + 366186496 = 13747^2 + 19136^2 .

It is not a de Polignac number, because 555166505 - 2⁶ = 555166441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55516646 + ... + 55516655.

It is an arithmetic number, because the mean of its divisors is an integer number (166549953).

Almost surely, 2^555166505 is an apocalyptic number.

It is an amenable number.

555166505 is a deficient number, since it is larger than the sum of its proper divisors (111033307).

555166505 is a wasteful number, since it uses less digits than its factorization.

555166505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111033306.

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 555166505 is about 23561.9715855868. The cubic root of 555166505 is about 821.8787503961.

The spelling of 555166505 in words is "five hundred fifty-five million, one hundred sixty-six thousand, five hundred five".