6670000081 has 2 divisors, whose sum is σ = 6670000082. Its totient is φ = 6670000080.

The previous prime is 6670000079. The next prime is 6670000093. The reversal of 6670000081 is 1800000766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4042925056 + 2627075025 = 63584^2 + 51255^2 .

It is a cyclic number.

It is not a de Polignac number, because 6670000081 - 2¹ = 6670000079 is a prime.

It is a super-2 number, since 2×6670000081² = 88977802161080013122, which contains 22 as substring.

Together with 6670000079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6670040081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335000040 + 3335000041.

It is an arithmetic number, because the mean of its divisors is an integer number (3335000041).

Almost surely, 2^6670000081 is an apocalyptic number.

It is an amenable number.

6670000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6670000081 is an equidigital number, since it uses as much as digits as its factorization.

6670000081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 6670000081 is about 81670.0684522794. The cubic root of 6670000081 is about 1882.3856917929.

The spelling of 6670000081 in words is "six billion, six hundred seventy million, eighty-one", and thus it is an aban number.