481666561 has 8 divisors (see below), whose sum is σ = 497608448. Its totient is φ = 465750000.

The previous prime is 481666547. The next prime is 481666571. The reversal of 481666561 is 165666184.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-481666561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (481666541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37186 + ... + 48436.

It is an arithmetic number, because the mean of its divisors is an integer number (62201056).

Almost surely, 2^481666561 is an apocalyptic number.

It is an amenable number.

481666561 is a deficient number, since it is larger than the sum of its proper divisors (15941887).

481666561 is a wasteful number, since it uses less digits than its factorization.

481666561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12663.

The product of its digits is 207360, while the sum is 43.

The square root of 481666561 is about 21946.9032211836. The cubic root of 481666561 is about 783.8786434271.

The spelling of 481666561 in words is "four hundred eighty-one million, six hundred sixty-six thousand, five hundred sixty-one".