2663506221 has 8 divisors (see below), whose sum is σ = 3551717664. Its totient is φ = 1775482800.

The previous prime is 2663506211. The next prime is 2663506243. The reversal of 2663506221 is 1226053662.

2663506221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2663506221 - 2¹⁰ = 2663505197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2663506201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9726 + ... + 73631.

It is an arithmetic number, because the mean of its divisors is an integer number (443964708).

Almost surely, 2^2663506221 is an apocalyptic number.

It is an amenable number.

2663506221 is a deficient number, since it is larger than the sum of its proper divisors (888211443).

2663506221 is a wasteful number, since it uses less digits than its factorization.

2663506221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94011.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2663506221 is about 51609.1679936811. The cubic root of 2663506221 is about 1386.1744994755.

Adding to 2663506221 its reverse (1226053662), we get a palindrome (3889559883).

The spelling of 2663506221 in words is "two billion, six hundred sixty-three million, five hundred six thousand, two hundred twenty-one".