505660166 has 16 divisors (see below), whose sum is σ = 835481088. Its totient is φ = 227613000.

The previous prime is 505660157. The next prime is 505660201. The reversal of 505660166 is 661066505.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 109310 + ... + 113841.

It is an arithmetic number, because the mean of its divisors is an integer number (52217568).

Almost surely, 2^505660166 is an apocalyptic number.

505660166 is a deficient number, since it is larger than the sum of its proper divisors (329820922).

505660166 is a wasteful number, since it uses less digits than its factorization.

505660166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223267.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 505660166 is about 22486.8887576739. Note that the first 3 decimals coincide. The cubic root of 505660166 is about 796.6842796088.

The spelling of 505660166 in words is "five hundred five million, six hundred sixty thousand, one hundred sixty-six".