478841661 has 12 divisors (see below), whose sum is σ = 691888860. Its totient is φ = 319122240.

The previous prime is 478841651. The next prime is 478841663. The reversal of 478841661 is 166148874.

It can be written as a sum of positive squares in 2 ways, for example, as 362331225 + 116510436 = 19035^2 + 10794^2 .

It is not a de Polignac number, because 478841661 - 2¹⁹ = 478317373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478841663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28075 + ... + 41783.

It is an arithmetic number, because the mean of its divisors is an integer number (57657405).

Almost surely, 2^478841661 is an apocalyptic number.

It is an amenable number.

478841661 is a deficient number, since it is larger than the sum of its proper divisors (213047199).

478841661 is a wasteful number, since it uses less digits than its factorization.

478841661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17596 (or 17593 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 478841661 is about 21882.4509824654. The cubic root of 478841661 is about 782.3431953832.

The spelling of 478841661 in words is "four hundred seventy-eight million, eight hundred forty-one thousand, six hundred sixty-one".