478155667 has 4 divisors (see below), whose sum is σ = 521624376. Its totient is φ = 434686960.

The previous prime is 478155631. The next prime is 478155673. The reversal of 478155667 is 766551874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478155667 - 2¹⁵ = 478122899 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478155667.

It is not an unprimeable number, because it can be changed into a prime (478155697) by changing a digit.

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, 21734338 + ... + 21734359.

It is an arithmetic number, because the mean of its divisors is an integer number (130406094).

Almost surely, 2^478155667 is an apocalyptic number.

478155667 is a deficient number, since it is larger than the sum of its proper divisors (43468709).

478155667 is a wasteful number, since it uses less digits than its factorization.

478155667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43468708.

The product of its digits is 1411200, while the sum is 49.

The square root of 478155667 is about 21866.7708407071. The cubic root of 478155667 is about 781.9694189195.

The spelling of 478155667 in words is "four hundred seventy-eight million, one hundred fifty-five thousand, six hundred sixty-seven".