6644900105 has 16 divisors (see below), whose sum is σ = 8036874000. Its totient is φ = 5274009600.

The previous prime is 6644900033. The next prime is 6644900131. The reversal of 6644900105 is 5010094466.

It can be written as a sum of positive squares in 8 ways, for example, as 1345642489 + 5299257616 = 36683^2 + 72796^2 .

It is not a de Polignac number, because 6644900105 - 2¹⁶ = 6644834569 is a prime.

It is a super-2 number, since 2×6644900105² = 88309394810858022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687305 + ... + 696905.

It is an arithmetic number, because the mean of its divisors is an integer number (502304625).

Almost surely, 2^6644900105 is an apocalyptic number.

It is an amenable number.

6644900105 is a deficient number, since it is larger than the sum of its proper divisors (1391973895).

6644900105 is a wasteful number, since it uses less digits than its factorization.

6644900105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10684.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 6644900105 is about 81516.2566915336. The cubic root of 6644900105 is about 1880.0215125990.

The spelling of 6644900105 in words is "six billion, six hundred forty-four million, nine hundred thousand, one hundred five".