481767661 has 4 divisors (see below), whose sum is σ = 488367292. Its totient is φ = 475168032.

The previous prime is 481767659. The next prime is 481767673. The reversal of 481767661 is 166767184.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 391802436 + 89965225 = 19794^2 + 9485^2 .

It is a cyclic number.

It is not a de Polignac number, because 481767661 - 2¹ = 481767659 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 (481767631) 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 3 ways as a sum of consecutive naturals, for example, 3299706 + ... + 3299851.

It is an arithmetic number, because the mean of its divisors is an integer number (122091823).

Almost surely, 2^481767661 is an apocalyptic number.

It is an amenable number.

481767661 is a deficient number, since it is larger than the sum of its proper divisors (6599631).

481767661 is an equidigital number, since it uses as much as digits as its factorization.

481767661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599630.

The product of its digits is 338688, while the sum is 46.

The square root of 481767661 is about 21949.2063865644. The cubic root of 481767661 is about 783.9334839835.

The spelling of 481767661 in words is "four hundred eighty-one million, seven hundred sixty-seven thousand, six hundred sixty-one".