1678881674 has 16 divisors (see below), whose sum is σ = 2541752136. Its totient is φ = 831667200.

The previous prime is 1678881647. The next prime is 1678881703. The reversal of 1678881674 is 4761888761.

It can be written as a sum of positive squares in 4 ways, for example, as 1673382649 + 5499025 = 40907^2 + 2345^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86114 + ... + 103794.

Almost surely, 2^1678881674 is an apocalyptic number.

1678881674 is a deficient number, since it is larger than the sum of its proper divisors (862870462).

1678881674 is a wasteful number, since it uses less digits than its factorization.

1678881674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18121.

The product of its digits is 3612672, while the sum is 56.

The square root of 1678881674 is about 40974.1586124718. The cubic root of 1678881674 is about 1188.5205525382.

The spelling of 1678881674 in words is "one billion, six hundred seventy-eight million, eight hundred eighty-one thousand, six hundred seventy-four".