681404074 has 8 divisors (see below), whose sum is σ = 1100729700. Its totient is φ = 314494176.

The previous prime is 681404071. The next prime is 681404089. The reversal of 681404074 is 470404186.

681404074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 676364049 + 5040025 = 26007^2 + 2245^2 .

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

It is not an unprimeable number, because it can be changed into a prime (681404071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13103899 + ... + 13103950.

Almost surely, 2^681404074 is an apocalyptic number.

681404074 is a deficient number, since it is larger than the sum of its proper divisors (419325626).

681404074 is a wasteful number, since it uses less digits than its factorization.

681404074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26207864.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 681404074 is about 26103.7176279548. The cubic root of 681404074 is about 879.9707609087.

The spelling of 681404074 in words is "six hundred eighty-one million, four hundred four thousand, seventy-four".