490910661 has 24 divisors (see below), whose sum is σ = 734814080. Its totient is φ = 315596736.

The previous prime is 490910647. The next prime is 490910677. The reversal of 490910661 is 166019094.

490910661 is a `hidden beast` number, since 490 + 9 + 106 + 61 = 666.

It is not a de Polignac number, because 490910661 - 2¹⁰ = 490909637 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 (490910611) 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, 22545 + ... + 38601.

Almost surely, 2^490910661 is an apocalyptic number.

It is an amenable number.

490910661 is a deficient number, since it is larger than the sum of its proper divisors (243903419).

490910661 is a wasteful number, since it uses less digits than its factorization.

490910661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16185 (or 16182 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 490910661 is about 22156.5038081372. The cubic root of 490910661 is about 788.8616093111.

The spelling of 490910661 in words is "four hundred ninety million, nine hundred ten thousand, six hundred sixty-one".