606681 has 6 divisors (see below), whose sum is σ = 876330. Its totient is φ = 404448.

The previous prime is 606673. The next prime is 606721. The reversal of 606681 is 186606.

It can be written as a sum of positive squares in only one way, i.e., 549081 + 57600 = 741^2 + 240^2 .

It is not a de Polignac number, because 606681 - 2³ = 606673 is a prime.

It is a super-2 number, since 2×606681² = 736123671522, which contains 22 as substring.

It is an Ulam number.

606681 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 606681.

It is not an unprimeable number, because it can be changed into a prime (606181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33696 + ... + 33713.

It is an arithmetic number, because the mean of its divisors is an integer number (146055).

2⁶⁰⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

606681 is a deficient number, since it is larger than the sum of its proper divisors (269649).

606681 is a wasteful number, since it uses less digits than its factorization.

606681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67415 (or 67412 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 606681 is about 778.8972974661. The cubic root of 606681 is about 84.6551658037.

It can be divided in two parts, 606 and 681, that multiplied together give a triangular number (412686 = T₉₀₈).

The spelling of 606681 in words is "six hundred six thousand, six hundred eighty-one".