506665101 has 4 divisors (see below), whose sum is σ = 675553472. Its totient is φ = 337776732.

The previous prime is 506665097. The next prime is 506665111. The reversal of 506665101 is 101566605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 506665101 - 2² = 506665097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506665111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84444181 + ... + 84444186.

It is an arithmetic number, because the mean of its divisors is an integer number (168888368).

Almost surely, 2^506665101 is an apocalyptic number.

It is an amenable number.

506665101 is a deficient number, since it is larger than the sum of its proper divisors (168888371).

506665101 is a wasteful number, since it uses less digits than its factorization.

506665101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168888370.

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

The square root of 506665101 is about 22509.2225765352. Note that the first 3 decimals coincide. The cubic root of 506665101 is about 797.2116997889.

The spelling of 506665101 in words is "five hundred six million, six hundred sixty-five thousand, one hundred one".