505016661 has 16 divisors (see below), whose sum is σ = 681384384. Its totient is φ = 332686464.

The previous prime is 505016657. The next prime is 505016669. The reversal of 505016661 is 166610505.

It is not a de Polignac number, because 505016661 - 2² = 505016657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505016669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90591 + ... + 96003.

It is an arithmetic number, because the mean of its divisors is an integer number (42586524).

Almost surely, 2^505016661 is an apocalyptic number.

It is an amenable number.

505016661 is a deficient number, since it is larger than the sum of its proper divisors (176367723).

505016661 is a wasteful number, since it uses less digits than its factorization.

505016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 505016661 is about 22472.5757535713. The cubic root of 505016661 is about 796.3461816917.

The spelling of 505016661 in words is "five hundred five million, sixteen thousand, six hundred sixty-one".