478151666 has 8 divisors (see below), whose sum is σ = 736612140. Its totient is φ = 232614288.

The previous prime is 478151599. The next prime is 478151693. The reversal of 478151666 is 666151874.

It can be written as a sum of positive squares in 2 ways, for example, as 478078225 + 73441 = 21865^2 + 271^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230681 + ... + 3230828.

Almost surely, 2^478151666 is an apocalyptic number.

478151666 is a deficient number, since it is larger than the sum of its proper divisors (258460474).

478151666 is a wasteful number, since it uses less digits than its factorization.

478151666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461548.

The product of its digits is 241920, while the sum is 44.

The square root of 478151666 is about 21866.6793546711. The cubic root of 478151666 is about 781.9672378527.

The spelling of 478151666 in words is "four hundred seventy-eight million, one hundred fifty-one thousand, six hundred sixty-six".