2735866681 has 4 divisors (see below), whose sum is σ = 2736125172. Its totient is φ = 2735608192.

The previous prime is 2735866649. The next prime is 2735866717. The reversal of 2735866681 is 1866685372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1103302656 + 1632564025 = 33216^2 + 40405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2735866681 - 2⁵ = 2735866649 is a prime.

It is a super-2 number, since 2×2735866681² = 14969932992411911522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2735866631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112660 + ... + 134773.

It is an arithmetic number, because the mean of its divisors is an integer number (684031293).

Almost surely, 2^2735866681 is an apocalyptic number.

It is an amenable number.

2735866681 is a deficient number, since it is larger than the sum of its proper divisors (258491).

2735866681 is a wasteful number, since it uses less digits than its factorization.

2735866681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258490.

The product of its digits is 2903040, while the sum is 52.

The square root of 2735866681 is about 52305.5129121205. The cubic root of 2735866681 is about 1398.6154135919.

The spelling of 2735866681 in words is "two billion, seven hundred thirty-five million, eight hundred sixty-six thousand, six hundred eighty-one".