6670981 has 6 divisors (see below), whose sum is σ = 6749970. Its totient is φ = 6592896.

The previous prime is 6670973. The next prime is 6671003. The reversal of 6670981 is 1890766.

It can be written as a sum of positive squares in 3 ways, for example, as 122500 + 6548481 = 350^2 + 2559^2 .

It is not a de Polignac number, because 6670981 - 2³ = 6670973 is a prime.

It is a super-2 number, since 2×6670981² = 89003975004722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6670981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6670901) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 9055 + ... + 9763.

It is an arithmetic number, because the mean of its divisors is an integer number (1124995).

Almost surely, 2^6670981 is an apocalyptic number.

It is an amenable number.

6670981 is a deficient number, since it is larger than the sum of its proper divisors (78989).

6670981 is an frugal number, since it uses more digits than its factorization.

6670981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 6670981 is about 2582.8242294047. The cubic root of 6670981 is about 188.2477964525.

The spelling of 6670981 in words is "six million, six hundred seventy thousand, nine hundred eighty-one".