2666021123 has 4 divisors (see below), whose sum is σ = 2667739368. Its totient is φ = 2664302880.

The previous prime is 2666021117. The next prime is 2666021129. The reversal of 2666021123 is 3211206662.

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

It is an interprime number because it is at equal distance from previous prime (2666021117) and next prime (2666021129).

It is a cyclic number.

It is not a de Polignac number, because 2666021123 - 2¹⁰ = 2666020099 is a prime.

It is a super-2 number, since 2×2666021123² = 14215337256564362258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666021129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856793 + ... + 859898.

It is an arithmetic number, because the mean of its divisors is an integer number (666934842).

Almost surely, 2^2666021123 is an apocalyptic number.

2666021123 is a deficient number, since it is larger than the sum of its proper divisors (1718245).

2666021123 is a wasteful number, since it uses less digits than its factorization.

2666021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718244.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2666021123 is about 51633.5271214354. The cubic root of 2666021123 is about 1386.6106409258.

Adding to 2666021123 its reverse (3211206662), we get a palindrome (5877227785).

The spelling of 2666021123 in words is "two billion, six hundred sixty-six million, twenty-one thousand, one hundred twenty-three".