6645105925 has 12 divisors (see below), whose sum is σ = 8241025120. Its totient is φ = 5315379120.

The previous prime is 6645105893. The next prime is 6645105931. The reversal of 6645105925 is 5295015466.

It is not a de Polignac number, because 6645105925 - 2⁵ = 6645105893 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260386 + ... + 284764.

Almost surely, 2^6645105925 is an apocalyptic number.

It is an amenable number.

6645105925 is a deficient number, since it is larger than the sum of its proper divisors (1595919195).

6645105925 is a wasteful number, since it uses less digits than its factorization.

6645105925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35292 (or 35287 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The square root of 6645105925 is about 81517.5191293258. The cubic root of 6645105925 is about 1880.0409230755.

The spelling of 6645105925 in words is "six billion, six hundred forty-five million, one hundred five thousand, nine hundred twenty-five".