663261105 has 32 divisors (see below), whose sum is σ = 1144321920. Its totient is φ = 326108160.

The previous prime is 663261091. The next prime is 663261107. The reversal of 663261105 is 501162366.

663261105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663261105 - 2⁸ = 663260849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663261107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195070 + ... + 198440.

It is an arithmetic number, because the mean of its divisors is an integer number (35760060).

Almost surely, 2^663261105 is an apocalyptic number.

663261105 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663261105 is a deficient number, since it is larger than the sum of its proper divisors (481060815).

663261105 is a wasteful number, since it uses less digits than its factorization.

663261105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 663261105 is about 25753.8561190358. The cubic root of 663261105 is about 872.0904085378.

It can be divided in two parts, 663261 and 105, that added together give a palindrome (663366).

The spelling of 663261105 in words is "six hundred sixty-three million, two hundred sixty-one thousand, one hundred five".