478330661 has 4 divisors (see below), whose sum is σ = 482974752. Its totient is φ = 473686572.

The previous prime is 478330637. The next prime is 478330673. The reversal of 478330661 is 166033874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478330661 - 2⁶ = 478330597 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 (478330631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2321891 + ... + 2322096.

It is an arithmetic number, because the mean of its divisors is an integer number (120743688).

Almost surely, 2^478330661 is an apocalyptic number.

It is an amenable number.

478330661 is a deficient number, since it is larger than the sum of its proper divisors (4644091).

478330661 is a wasteful number, since it uses less digits than its factorization.

478330661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644090.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 478330661 is about 21870.7718428043. The cubic root of 478330661 is about 782.0648015713.

The spelling of 478330661 in words is "four hundred seventy-eight million, three hundred thirty thousand, six hundred sixty-one".