2668754749 has 4 divisors (see below), whose sum is σ = 2677281436. Its totient is φ = 2660228064.

The previous prime is 2668754747. The next prime is 2668754761. The reversal of 2668754749 is 9474578662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9474578662 = 2 ⋅4737289331.

It can be written as a sum of positive squares in 2 ways, for example, as 1256348025 + 1412406724 = 35445^2 + 37582^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668754749 - 2¹ = 2668754747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2668754693 and 2668754702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668754747) 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, 4262874 + ... + 4263499.

It is an arithmetic number, because the mean of its divisors is an integer number (669320359).

Almost surely, 2^2668754749 is an apocalyptic number.

It is an amenable number.

2668754749 is a deficient number, since it is larger than the sum of its proper divisors (8526687).

2668754749 is an equidigital number, since it uses as much as digits as its factorization.

2668754749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8526686.

The product of its digits is 20321280, while the sum is 58.

The square root of 2668754749 is about 51659.9917634527. The cubic root of 2668754749 is about 1387.0844031269.

The spelling of 2668754749 in words is "two billion, six hundred sixty-eight million, seven hundred fifty-four thousand, seven hundred forty-nine".