2666003321 has 8 divisors (see below), whose sum is σ = 2762422920. Its totient is φ = 2569883008.

The previous prime is 2666003303. The next prime is 2666003339. The reversal of 2666003321 is 1233006662.

It is an interprime number because it is at equal distance from previous prime (2666003303) and next prime (2666003339).

It can be written as a sum of positive squares in 4 ways, for example, as 585640000 + 2080363321 = 24200^2 + 45611^2 .

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 2666003321 - 2²⁶ = 2598894457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666003381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56606 + ... + 92391.

It is an arithmetic number, because the mean of its divisors is an integer number (345302865).

Almost surely, 2^2666003321 is an apocalyptic number.

It is an amenable number.

2666003321 is a deficient number, since it is larger than the sum of its proper divisors (96419599).

2666003321 is a wasteful number, since it uses less digits than its factorization.

2666003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149643.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 2666003321 is about 51633.3547331567. The cubic root of 2666003321 is about 1386.6075546164.

Adding to 2666003321 its reverse (1233006662), we get a palindrome (3899009983).

The spelling of 2666003321 in words is "two billion, six hundred sixty-six million, three thousand, three hundred twenty-one".