6641925425 has 6 divisors (see below), whose sum is σ = 8235987558. Its totient is φ = 5313540320.

The previous prime is 6641925401. The next prime is 6641925427. The reversal of 6641925425 is 5245291466.

It can be written as a sum of positive squares in 3 ways, for example, as 58874929 + 6583050496 = 7673^2 + 81136^2 .

It is not a de Polignac number, because 6641925425 - 2²⁰ = 6640876849 is a prime.

It is a super-2 number, since 2×6641925425² = 88230346702522861250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6641925427) 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 5 ways as a sum of consecutive naturals, for example, 132838484 + ... + 132838533.

It is an arithmetic number, because the mean of its divisors is an integer number (1372664593).

Almost surely, 2^6641925425 is an apocalyptic number.

It is an amenable number.

6641925425 is a deficient number, since it is larger than the sum of its proper divisors (1594062133).

6641925425 is a wasteful number, since it uses less digits than its factorization.

6641925425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265677027 (or 265677022 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 6641925425 is about 81498.0087180049. The cubic root of 6641925425 is about 1879.7409316509.

The spelling of 6641925425 in words is "six billion, six hundred forty-one million, nine hundred twenty-five thousand, four hundred twenty-five".