2660023221 has 8 divisors (see below), whose sum is σ = 3552933120. Its totient is φ = 1770231072.

The previous prime is 2660023153. The next prime is 2660023229. The reversal of 2660023221 is 1223200662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2660023221 - 2²³ = 2651634613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2660023191 and 2660023200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660023229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777445 + ... + 780858.

It is an arithmetic number, because the mean of its divisors is an integer number (444116640).

Almost surely, 2^2660023221 is an apocalyptic number.

It is an amenable number.

2660023221 is a deficient number, since it is larger than the sum of its proper divisors (892909899).

2660023221 is a wasteful number, since it uses less digits than its factorization.

2660023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558875.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2660023221 is about 51575.4129503584. The cubic root of 2660023221 is about 1385.5700140822.

Adding to 2660023221 its reverse (1223200662), we get a palindrome (3883223883).

The spelling of 2660023221 in words is "two billion, six hundred sixty million, twenty-three thousand, two hundred twenty-one".