681246705 has 16 divisors (see below), whose sum is σ = 1090321344. Its totient is φ = 363222720.

The previous prime is 681246697. The next prime is 681246751. The reversal of 681246705 is 507642186.

It is not a de Polignac number, because 681246705 - 2³ = 681246697 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84135 + ... + 91875.

It is an arithmetic number, because the mean of its divisors is an integer number (68145084).

Almost surely, 2^681246705 is an apocalyptic number.

It is an amenable number.

681246705 is a deficient number, since it is larger than the sum of its proper divisors (409074639).

681246705 is a wasteful number, since it uses less digits than its factorization.

681246705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 681246705 is about 26100.7031514479. The cubic root of 681246705 is about 879.9030131577.

The spelling of 681246705 in words is "six hundred eighty-one million, two hundred forty-six thousand, seven hundred five".