6640314025 has 6 divisors (see below), whose sum is σ = 8233989422. Its totient is φ = 5312251200.

The previous prime is 6640314017. The next prime is 6640314029. The reversal of 6640314025 is 5204130466.

It can be written as a sum of positive squares in 3 ways, for example, as 19881 + 6640294144 = 141^2 + 81488^2 .

It is not a de Polignac number, because 6640314025 - 2³ = 6640314017 is a prime.

It is a super-2 number, since 2×6640314025² = 88187540701223401250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640314029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132806256 + ... + 132806305.

Almost surely, 2^6640314025 is an apocalyptic number.

It is an amenable number.

6640314025 is a deficient number, since it is larger than the sum of its proper divisors (1593675397).

6640314025 is a wasteful number, since it uses less digits than its factorization.

6640314025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265612571 (or 265612566 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6640314025 is about 81488.1219871952. The cubic root of 6640314025 is about 1879.5889044734.

The spelling of 6640314025 in words is "six billion, six hundred forty million, three hundred fourteen thousand, twenty-five".