681033671 has 8 divisors (see below), whose sum is σ = 685149360. Its totient is φ = 676930752.

The previous prime is 681033667. The next prime is 681033679. The reversal of 681033671 is 176330186.

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

It is a cyclic number.

It is not a de Polignac number, because 681033671 - 2² = 681033667 is a prime.

It is a super-2 number, since 2×681033671² = 927613722071472482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681033679) 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, 116996 + ... + 122678.

It is an arithmetic number, because the mean of its divisors is an integer number (85643670).

Almost surely, 2^681033671 is an apocalyptic number.

681033671 is a deficient number, since it is larger than the sum of its proper divisors (4115689).

681033671 is a wasteful number, since it uses less digits than its factorization.

681033671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 681033671 is about 26096.6218311873. The cubic root of 681033671 is about 879.8112848603.

The spelling of 681033671 in words is "six hundred eighty-one million, thirty-three thousand, six hundred seventy-one".