680066 has 8 divisors (see below), whose sum is σ = 1024140. Its totient is φ = 338688.

The previous prime is 680059. The next prime is 680077. The reversal of 680066 is 660086.

It can be written as a sum of positive squares in 2 ways, for example, as 648025 + 32041 = 805^2 + 179^2 .

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

It is a plaindrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 1178.

2⁶⁸⁰⁰⁶⁶ is an apocalyptic number.

680066 is a deficient number, since it is larger than the sum of its proper divisors (344074).

680066 is a wasteful number, since it uses less digits than its factorization.

680066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 680066 is about 824.6611425307. The cubic root of 680066 is about 87.9394383586.

The spelling of 680066 in words is "six hundred eighty thousand, sixty-six".