670866 has 16 divisors (see below), whose sum is σ = 1533504. Its totient is φ = 191664.

The previous prime is 670853. The next prime is 670867. The reversal of 670866 is 668076.

It is a super-2 number, since 2×670866² = 900122379912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (670867) 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, 7945 + ... + 8028.

It is an arithmetic number, because the mean of its divisors is an integer number (95844).

2⁶⁷⁰⁸⁶⁶ is an apocalyptic number.

670866 is an abundant number, since it is smaller than the sum of its proper divisors (862638).

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

670866 is a wasteful number, since it uses less digits than its factorization.

670866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15985.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 670866 is about 819.0641000557. The cubic root of 670866 is about 87.5410854673.

The spelling of 670866 in words is "six hundred seventy thousand, eight hundred sixty-six".