2107066681 has 2 divisors, whose sum is σ = 2107066682. Its totient is φ = 2107066680.

The previous prime is 2107066679. The next prime is 2107066789. The reversal of 2107066681 is 1866607012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1720590400 + 386476281 = 41480^2 + 19659^2 .

It is a cyclic number.

It is not a de Polignac number, because 2107066681 - 2¹ = 2107066679 is a prime.

It is a super-2 number, since 2×2107066681² = 8879459996360711522, which contains 22 as substring.

Together with 2107066679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2107066681.

It is not a weakly prime, because it can be changed into another prime (2107066651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053533340 + 1053533341.

It is an arithmetic number, because the mean of its divisors is an integer number (1053533341).

Almost surely, 2^2107066681 is an apocalyptic number.

It is an amenable number.

2107066681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2107066681 is an equidigital number, since it uses as much as digits as its factorization.

2107066681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2107066681 is about 45902.7960041651. The cubic root of 2107066681 is about 1282.0139765221.

The spelling of 2107066681 in words is "two billion, one hundred seven million, sixty-six thousand, six hundred eighty-one".