506665649 has 8 divisors (see below), whose sum is σ = 581792448. Its totient is φ = 432225360.

The previous prime is 506665561. The next prime is 506665673. The reversal of 506665649 is 946566605.

It is a happy number.

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

It is not a de Polignac number, because 506665649 - 2¹² = 506661553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506665349) 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, 170042 + ... + 172995.

It is an arithmetic number, because the mean of its divisors is an integer number (72724056).

Almost surely, 2^506665649 is an apocalyptic number.

It is an amenable number.

506665649 is a deficient number, since it is larger than the sum of its proper divisors (75126799).

506665649 is a wasteful number, since it uses less digits than its factorization.

506665649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343255.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The square root of 506665649 is about 22509.2347493201. The cubic root of 506665649 is about 797.2119872054.

The spelling of 506665649 in words is "five hundred six million, six hundred sixty-five thousand, six hundred forty-nine".