6665319025 has 24 divisors (see below), whose sum is σ = 8495047800. Its totient is φ = 5185804800.

The previous prime is 6665319019. The next prime is 6665319041. The reversal of 6665319025 is 5209135666.

It can be written as a sum of positive squares in 12 ways, for example, as 5757622641 + 907696384 = 75879^2 + 30128^2 .

It is not a de Polignac number, because 6665319025 - 2¹³ = 6665310833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111171 + ... + 160279.

It is an arithmetic number, because the mean of its divisors is an integer number (353960325).

Almost surely, 2^6665319025 is an apocalyptic number.

It is an amenable number.

6665319025 is a deficient number, since it is larger than the sum of its proper divisors (1829728775).

6665319025 is a wasteful number, since it uses less digits than its factorization.

6665319025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49269 (or 49264 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 6665319025 is about 81641.4050895745. The cubic root of 6665319025 is about 1881.9452312796.

The spelling of 6665319025 in words is "six billion, six hundred sixty-five million, three hundred nineteen thousand, twenty-five".