6670575981 has 6 divisors (see below), whose sum is σ = 9635276430. Its totient is φ = 4447050648.

The previous prime is 6670575979. The next prime is 6670576019. The reversal of 6670575981 is 1895750766.

6670575981 is a `hidden beast` number, since 6 + 67 + 0 + 575 + 9 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5521976100 + 1148599881 = 74310^2 + 33891^2 .

It is not a de Polignac number, because 6670575981 - 2¹ = 6670575979 is a prime.

It is a super-2 number, since 2×6670575981² = 88993167836588224722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6670575941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370587546 + ... + 370587563.

It is an arithmetic number, because the mean of its divisors is an integer number (1605879405).

Almost surely, 2^6670575981 is an apocalyptic number.

It is an amenable number.

6670575981 is a deficient number, since it is larger than the sum of its proper divisors (2964700449).

6670575981 is a wasteful number, since it uses less digits than its factorization.

6670575981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741175115 (or 741175112 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 6670575981 is about 81673.5941476803. The cubic root of 6670575981 is about 1882.4398664410.

The spelling of 6670575981 in words is "six billion, six hundred seventy million, five hundred seventy-five thousand, nine hundred eighty-one".