2668812747 has 4 divisors (see below), whose sum is σ = 3558417000. Its totient is φ = 1779208496.

The previous prime is 2668812743. The next prime is 2668812761. The reversal of 2668812747 is 7472188662.

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

It is a cyclic number.

It is not a de Polignac number, because 2668812747 - 2² = 2668812743 is a prime.

It is a super-2 number, since 2×2668812747² = 14245122957099372018, 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 2668812747.

It is not an unprimeable number, because it can be changed into a prime (2668812743) 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, 444802122 + ... + 444802127.

It is an arithmetic number, because the mean of its divisors is an integer number (889604250).

Almost surely, 2^2668812747 is an apocalyptic number.

2668812747 is a deficient number, since it is larger than the sum of its proper divisors (889604253).

2668812747 is an equidigital number, since it uses as much as digits as its factorization.

2668812747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889604252.

The product of its digits is 1806336, while the sum is 51.

The square root of 2668812747 is about 51660.5531038916. The cubic root of 2668812747 is about 1387.0944512012.

The spelling of 2668812747 in words is "two billion, six hundred sixty-eight million, eight hundred twelve thousand, seven hundred forty-seven".