501115665 has 16 divisors (see below), whose sum is σ = 803794176. Its totient is φ = 266592000.

The previous prime is 501115649. The next prime is 501115669. The reversal of 501115665 is 566511105.

It is not a de Polignac number, because 501115665 - 2⁴ = 501115649 is a prime.

It is a super-2 number, since 2×501115665² = 502233819416784450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (501115669) 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 15 ways as a sum of consecutive naturals, for example, 35641 + ... + 47670.

It is an arithmetic number, because the mean of its divisors is an integer number (50237136).

Almost surely, 2^501115665 is an apocalyptic number.

It is an amenable number.

501115665 is a deficient number, since it is larger than the sum of its proper divisors (302678511).

501115665 is a wasteful number, since it uses less digits than its factorization.

501115665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83720.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 501115665 is about 22385.6129020405. The cubic root of 501115665 is about 794.2904233810.

The spelling of 501115665 in words is "five hundred one million, one hundred fifteen thousand, six hundred sixty-five".