481663661 has 16 divisors (see below), whose sum is σ = 519279360. Its totient is φ = 445331520.

The previous prime is 481663643. The next prime is 481663673. The reversal of 481663661 is 166366184.

It is a cyclic number.

It is not a de Polignac number, because 481663661 - 2¹⁸ = 481401517 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 (481663681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482615 + ... + 483611.

It is an arithmetic number, because the mean of its divisors is an integer number (32454960).

Almost surely, 2^481663661 is an apocalyptic number.

It is an amenable number.

481663661 is a deficient number, since it is larger than the sum of its proper divisors (37615699).

481663661 is a wasteful number, since it uses less digits than its factorization.

481663661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its digits is 124416, while the sum is 41.

The square root of 481663661 is about 21946.8371525375. The cubic root of 481663661 is about 783.8770702415.

The spelling of 481663661 in words is "four hundred eighty-one million, six hundred sixty-three thousand, six hundred sixty-one".