668970 has 24 divisors (see below), whose sum is σ = 1739556. Its totient is φ = 178368.

The previous prime is 668963. The next prime is 668989. The reversal of 668970 is 79866.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 74529 = 771^2 + 273^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3627 + ... + 3806.

2⁶⁶⁸⁹⁷⁰ is an apocalyptic number.

668970 is an abundant number, since it is smaller than the sum of its proper divisors (1070586).

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

668970 is a wasteful number, since it uses less digits than its factorization.

668970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7446 (or 7443 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 668970 is about 817.9058625539. The cubic root of 668970 is about 87.4585381796.

The spelling of 668970 in words is "six hundred sixty-eight thousand, nine hundred seventy".