505595661 has 8 divisors (see below), whose sum is σ = 674484384. Its totient is φ = 336885360.

The previous prime is 505595653. The next prime is 505595669. The reversal of 505595661 is 166595505.

It is an interprime number because it is at equal distance from previous prime (505595653) and next prime (505595669).

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

It is not a de Polignac number, because 505595661 - 2³ = 505595653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505595669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37846 + ... + 49431.

It is an arithmetic number, because the mean of its divisors is an integer number (84310548).

Almost surely, 2^505595661 is an apocalyptic number.

It is an amenable number.

505595661 is a deficient number, since it is larger than the sum of its proper divisors (168888723).

505595661 is a wasteful number, since it uses less digits than its factorization.

505595661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89211.

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 505595661 is about 22485.4544316987. The cubic root of 505595661 is about 796.6504015828.

The spelling of 505595661 in words is "five hundred five million, five hundred ninety-five thousand, six hundred sixty-one".