663206241 has 16 divisors (see below), whose sum is σ = 920626304. Its totient is φ = 424289664.

The previous prime is 663206221. The next prime is 663206273. The reversal of 663206241 is 142602366.

It is not a de Polignac number, because 663206241 - 2⁹ = 663205729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663206199 and 663206208.

It is not an unprimeable number, because it can be changed into a prime (663206221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32821 + ... + 49026.

It is an arithmetic number, because the mean of its divisors is an integer number (57539144).

Almost surely, 2^663206241 is an apocalyptic number.

It is an amenable number.

663206241 is a deficient number, since it is larger than the sum of its proper divisors (257420063).

663206241 is a wasteful number, since it uses less digits than its factorization.

663206241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81960.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 663206241 is about 25752.7909361296. The cubic root of 663206241 is about 872.0663618554.

The spelling of 663206241 in words is "six hundred sixty-three million, two hundred six thousand, two hundred forty-one".