2706778681 has 8 divisors (see below), whose sum is σ = 2754696704. Its totient is φ = 2658975120.

The previous prime is 2706778661. The next prime is 2706778717. The reversal of 2706778681 is 1868776072.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2706778681 is a prime.

It is a super-2 number, since 2×2706778681² = 14653301655832199522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2706778601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19816 + ... + 76198.

It is an arithmetic number, because the mean of its divisors is an integer number (344337088).

Almost surely, 2^2706778681 is an apocalyptic number.

It is an amenable number.

2706778681 is a deficient number, since it is larger than the sum of its proper divisors (47918023).

2706778681 is an equidigital number, since it uses as much as digits as its factorization.

2706778681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57231.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The square root of 2706778681 is about 52026.7112260616. The cubic root of 2706778681 is about 1393.6410039882.

The spelling of 2706778681 in words is "two billion, seven hundred six million, seven hundred seventy-eight thousand, six hundred eighty-one".