481611661 has 4 divisors (see below), whose sum is σ = 482349852. Its totient is φ = 480873472.

The previous prime is 481611659. The next prime is 481611703. The reversal of 481611661 is 166116184.

It is a happy number.

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 60746436 + 420865225 = 7794^2 + 20515^2 .

It is a cyclic number.

It is not a de Polignac number, because 481611661 - 2¹ = 481611659 is a prime.

It is a super-2 number, since 2×481611661² = 463899584022357842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481611161) 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, 368116 + ... + 369421.

It is an arithmetic number, because the mean of its divisors is an integer number (120587463).

Almost surely, 2^481611661 is an apocalyptic number.

It is an amenable number.

481611661 is a deficient number, since it is larger than the sum of its proper divisors (738191).

481611661 is an equidigital number, since it uses as much as digits as its factorization.

481611661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738190.

The product of its digits is 6912, while the sum is 34.

The square root of 481611661 is about 21945.6524396063. The cubic root of 481611661 is about 783.8488603253.

The spelling of 481611661 in words is "four hundred eighty-one million, six hundred eleven thousand, six hundred sixty-one".