2680266989 has 4 divisors (see below), whose sum is σ = 2682733824. Its totient is φ = 2677800156.

The previous prime is 2680266973. The next prime is 2680266991. The reversal of 2680266989 is 9896620862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9896620862 = 2 ⋅4948310431.

It is a cyclic number.

It is not a de Polignac number, because 2680266989 - 2⁴ = 2680266973 is a prime.

It is a super-2 number, since 2×2680266989² = 14367662264646252242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2680266929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231787 + ... + 1233960.

It is an arithmetic number, because the mean of its divisors is an integer number (670683456).

Almost surely, 2^2680266989 is an apocalyptic number.

It is an amenable number.

2680266989 is a deficient number, since it is larger than the sum of its proper divisors (2466835).

2680266989 is a wasteful number, since it uses less digits than its factorization.

2680266989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466834.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The square root of 2680266989 is about 51771.2950291955. The cubic root of 2680266989 is about 1389.0760364066.

The spelling of 2680266989 in words is "two billion, six hundred eighty million, two hundred sixty-six thousand, nine hundred eighty-nine".