681067401 has 8 divisors (see below), whose sum is σ = 1037817024. Its totient is φ = 389181360.

The previous prime is 681067397. The next prime is 681067403. The reversal of 681067401 is 104760186.

It is a happy number.

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

It is not a de Polignac number, because 681067401 - 2² = 681067397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681067403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16215870 + ... + 16215911.

It is an arithmetic number, because the mean of its divisors is an integer number (129727128).

Almost surely, 2^681067401 is an apocalyptic number.

It is an amenable number.

681067401 is a deficient number, since it is larger than the sum of its proper divisors (356749623).

681067401 is a wasteful number, since it uses less digits than its factorization.

681067401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32431791.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 681067401 is about 26097.2680754136. The cubic root of 681067401 is about 879.8258096168.

The spelling of 681067401 in words is "six hundred eighty-one million, sixty-seven thousand, four hundred one".