1668471404 has 6 divisors (see below), whose sum is σ = 2919824964. Its totient is φ = 834235700.

The previous prime is 1668471403. The next prime is 1668471439. The reversal of 1668471404 is 4041748661.

It is not an unprimeable number, because it can be changed into a prime (1668471401) 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 as a sum of consecutive naturals, namely, 208558922 + ... + 208558929.

It is an arithmetic number, because the mean of its divisors is an integer number (486637494).

Almost surely, 2^1668471404 is an apocalyptic number.

It is an amenable number.

1668471404 is a deficient number, since it is larger than the sum of its proper divisors (1251353560).

1668471404 is a wasteful number, since it uses less digits than its factorization.

1668471404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417117855 (or 417117853 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 1668471404 is about 40846.9264939236. The cubic root of 1668471404 is about 1186.0588976644.

It can be divided in two parts, 16684 and 71404, that added together give a palindrome (88088).

The spelling of 1668471404 in words is "one billion, six hundred sixty-eight million, four hundred seventy-one thousand, four hundred four".