478668657 has 8 divisors (see below), whose sum is σ = 640874080. Its totient is φ = 317787840.

The previous prime is 478668649. The next prime is 478668721. The reversal of 478668657 is 756866874.

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

It is not a de Polignac number, because 478668657 - 2³ = 478668649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 478668597 and 478668606.

It is not an unprimeable number, because it can be changed into a prime (478668457) 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 7 ways as a sum of consecutive naturals, for example, 330307 + ... + 331752.

It is an arithmetic number, because the mean of its divisors is an integer number (80109260).

Almost surely, 2^478668657 is an apocalyptic number.

It is an amenable number.

478668657 is a deficient number, since it is larger than the sum of its proper divisors (162205423).

478668657 is a wasteful number, since it uses less digits than its factorization.

478668657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662303.

The product of its digits is 13547520, while the sum is 57.

The square root of 478668657 is about 21878.4975946704. The cubic root of 478668657 is about 782.2489646476.

The spelling of 478668657 in words is "four hundred seventy-eight million, six hundred sixty-eight thousand, six hundred fifty-seven".