506661001 has 24 divisors (see below), whose sum is σ = 658445760. Its totient is φ = 381168480.

The previous prime is 506660989. The next prime is 506661019. The reversal of 506661001 is 100166605.

It is not a de Polignac number, because 506661001 - 2¹¹ = 506658953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (506661031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14250 + ... + 34876.

It is an arithmetic number, because the mean of its divisors is an integer number (27435240).

Almost surely, 2^506661001 is an apocalyptic number.

It is an amenable number.

506661001 is a deficient number, since it is larger than the sum of its proper divisors (151784759).

506661001 is a wasteful number, since it uses less digits than its factorization.

506661001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20685 (or 20674 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 506661001 is about 22509.1315025702. The cubic root of 506661001 is about 797.2095494027.

The spelling of 506661001 in words is "five hundred six million, six hundred sixty-one thousand, one".