2699627681 has 4 divisors (see below), whose sum is σ = 2699981892. Its totient is φ = 2699273472.

The previous prime is 2699627669. The next prime is 2699627683. The reversal of 2699627681 is 1867269962.

It is a happy number.

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 2484125281 + 215502400 = 49841^2 + 14680^2 .

It is a cyclic number.

It is not a de Polignac number, because 2699627681 - 2⁶ = 2699627617 is a prime.

It is a super-2 number, since 2×2699627681² = 14575979232042875522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2699627683) 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, 165416 + ... + 181001.

It is an arithmetic number, because the mean of its divisors is an integer number (674995473).

Almost surely, 2^2699627681 is an apocalyptic number.

It is an amenable number.

2699627681 is a deficient number, since it is larger than the sum of its proper divisors (354211).

2699627681 is an equidigital number, since it uses as much as digits as its factorization.

2699627681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354210.

The product of its digits is 3919104, while the sum is 56.

The square root of 2699627681 is about 51957.9414623020. The cubic root of 2699627681 is about 1392.4126415226.

The spelling of 2699627681 in words is "two billion, six hundred ninety-nine million, six hundred twenty-seven thousand, six hundred eighty-one".