6665880825 has 30 divisors (see below), whose sum is σ = 12347519294. Its totient is φ = 3555135360.

The previous prime is 6665880799. The next prime is 6665880839. The reversal of 6665880825 is 5280885666.

It can be written as a sum of positive squares in 3 ways, for example, as 715455504 + 5950425321 = 26748^2 + 77139^2 .

It is not a de Polignac number, because 6665880825 - 2¹¹ = 6665878777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1643872 + ... + 1647921.

Almost surely, 2^6665880825 is an apocalyptic number.

It is an amenable number.

6665880825 is a deficient number, since it is larger than the sum of its proper divisors (5681638469).

6665880825 is a wasteful number, since it uses less digits than its factorization.

6665880825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291815 (or 3291801 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The square root of 6665880825 is about 81644.8456731961. The cubic root of 6665880825 is about 1881.9981043241.

The spelling of 6665880825 in words is "six billion, six hundred sixty-five million, eight hundred eighty thousand, eight hundred twenty-five".