1668477674 has 8 divisors (see below), whose sum is σ = 2503633860. Its totient is φ = 833933056.

The previous prime is 1668477637. The next prime is 1668477719. The reversal of 1668477674 is 4767748661.

It can be written as a sum of positive squares in 2 ways, for example, as 1121245225 + 547232449 = 33485^2 + 23393^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146009 + ... + 157020.

Almost surely, 2^1668477674 is an apocalyptic number.

1668477674 is a deficient number, since it is larger than the sum of its proper divisors (835156186).

1668477674 is a wasteful number, since it uses less digits than its factorization.

1668477674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305784.

The product of its digits is 9483264, while the sum is 56.

The square root of 1668477674 is about 40847.0032438121. The cubic root of 1668477674 is about 1186.0603833716.

The spelling of 1668477674 in words is "one billion, six hundred sixty-eight million, four hundred seventy-seven thousand, six hundred seventy-four".