681563067 has 8 divisors (see below), whose sum is σ = 913364496. Its totient is φ = 452068512.

The previous prime is 681563053. The next prime is 681563111. The reversal of 681563067 is 760365186.

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

It is not a de Polignac number, because 681563067 - 2¹⁰ = 681562043 is a prime.

It is a super-3 number, since 3×681563067³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (681563567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 576028 + ... + 577209.

It is an arithmetic number, because the mean of its divisors is an integer number (114170562).

Almost surely, 2^681563067 is an apocalyptic number.

681563067 is a deficient number, since it is larger than the sum of its proper divisors (231801429).

681563067 is a wasteful number, since it uses less digits than its factorization.

681563067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153437.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 681563067 is about 26106.7628594585. The cubic root of 681563067 is about 880.0391972038.

The spelling of 681563067 in words is "six hundred eighty-one million, five hundred sixty-three thousand, sixty-seven".