478666057 has 2 divisors, whose sum is σ = 478666058. Its totient is φ = 478666056.

The previous prime is 478666039. The next prime is 478666117. The reversal of 478666057 is 750666874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348158281 + 130507776 = 18659^2 + 11424^2 .

It is a cyclic number.

It is not a de Polignac number, because 478666057 - 2²⁷ = 344448329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478666057.

It is not a weakly prime, because it can be changed into another prime (478666007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239333028 + 239333029.

It is an arithmetic number, because the mean of its divisors is an integer number (239333029).

Almost surely, 2^478666057 is an apocalyptic number.

It is an amenable number.

478666057 is a deficient number, since it is larger than the sum of its proper divisors (1).

478666057 is an equidigital number, since it uses as much as digits as its factorization.

478666057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The square root of 478666057 is about 21878.4381755188. The cubic root of 478666057 is about 782.2475483227.

The spelling of 478666057 in words is "four hundred seventy-eight million, six hundred sixty-six thousand, fifty-seven".