2668240081 has 8 divisors (see below), whose sum is σ = 2880881640. Its totient is φ = 2456654592.

The previous prime is 2668240039. The next prime is 2668240111. The reversal of 2668240081 is 1800428662.

It can be written as a sum of positive squares in 4 ways, for example, as 41165056 + 2627075025 = 6416^2 + 51255^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2668240081 - 2¹¹ = 2668238033 is a prime.

It is a super-2 number, since 2×2668240081² = 14239010259709773122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2668240081.

It is not an unprimeable number, because it can be changed into a prime (2668240021) 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, 258760 + ... + 268873.

It is an arithmetic number, because the mean of its divisors is an integer number (360110205).

Almost surely, 2^2668240081 is an apocalyptic number.

It is an amenable number.

2668240081 is a deficient number, since it is larger than the sum of its proper divisors (212641559).

2668240081 is a wasteful number, since it uses less digits than its factorization.

2668240081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528035.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 2668240081 is about 51655.0102216619. The cubic root of 2668240081 is about 1386.9952312198.

The spelling of 2668240081 in words is "two billion, six hundred sixty-eight million, two hundred forty thousand, eighty-one".