505127661 has 8 divisors (see below), whose sum is σ = 682729920. Its totient is φ = 332138592.

The previous prime is 505127657. The next prime is 505127677. The reversal of 505127661 is 166721505.

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

It is not a de Polignac number, because 505127661 - 2² = 505127657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505127461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153041 + ... + 1153478.

It is an arithmetic number, because the mean of its divisors is an integer number (85341240).

Almost surely, 2^505127661 is an apocalyptic number.

It is an amenable number.

505127661 is a deficient number, since it is larger than the sum of its proper divisors (177602259).

505127661 is a wasteful number, since it uses less digits than its factorization.

505127661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306595.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 505127661 is about 22475.0452947263. The cubic root of 505127661 is about 796.4045216487.

The spelling of 505127661 in words is "five hundred five million, one hundred twenty-seven thousand, six hundred sixty-one".