606781 has 8 divisors (see below), whose sum is σ = 734400. Its totient is φ = 489408.

The previous prime is 606757. The next prime is 606791. The reversal of 606781 is 187606.

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 606781 - 2⁷ = 606653 is a prime.

It is a super-2 number, since 2×606781² = 736366363922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (91800).

2⁶⁰⁶⁷⁸¹ is an apocalyptic number.

It is an amenable number.

606781 is a deficient number, since it is larger than the sum of its proper divisors (127619).

606781 is a wasteful number, since it uses less digits than its factorization.

606781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 606781 is about 778.9614881366. The cubic root of 606781 is about 84.6598168210.

The spelling of 606781 in words is "six hundred six thousand, seven hundred eighty-one".