680670 has 32 divisors (see below), whose sum is σ = 1815840. Its totient is φ = 181440.

The previous prime is 680657. The next prime is 680681. The reversal of 680670 is 76086.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 991 + ... + 1530.

It is an arithmetic number, because the mean of its divisors is an integer number (56745).

2⁶⁸⁰⁶⁷⁰ is an apocalyptic number.

680670 is an abundant number, since it is smaller than the sum of its proper divisors (1135170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680670 is a wasteful number, since it uses less digits than its factorization.

680670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537 (or 2531 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 680670 is about 825.0272722765. The cubic root of 680670 is about 87.9654650990.

The spelling of 680670 in words is "six hundred eighty thousand, six hundred seventy".