505106666 has 8 divisors (see below), whose sum is σ = 758862624. Its totient is φ = 252152460.

The previous prime is 505106639. The next prime is 505106671. The reversal of 505106666 is 666601505.

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

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, 198860 + ... + 201383.

It is an arithmetic number, because the mean of its divisors is an integer number (94857828).

Almost surely, 2^505106666 is an apocalyptic number.

505106666 is a deficient number, since it is larger than the sum of its proper divisors (253755958).

505106666 is a wasteful number, since it uses less digits than its factorization.

505106666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400876.

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

The square root of 505106666 is about 22474.5782162870. The cubic root of 505106666 is about 796.3934876429.

The spelling of 505106666 in words is "five hundred five million, one hundred six thousand, six hundred sixty-six".