6665244138 has 64 divisors (see below), whose sum is σ = 17166090240. Its totient is φ = 1877526000.

The previous prime is 6665244127. The next prime is 6665244149. The reversal of 6665244138 is 8314425666.

It is an interprime number because it is at equal distance from previous prime (6665244127) and next prime (6665244149).

It is a junction number, because it is equal to n+sod(n) for n = 6665244093 and 6665244102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97338 + ... + 151013.

It is an arithmetic number, because the mean of its divisors is an integer number (268220160).

Almost surely, 2^6665244138 is an apocalyptic number.

6665244138 is an abundant number, since it is smaller than the sum of its proper divisors (10500846102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6665244138 is a wasteful number, since it uses less digits than its factorization.

6665244138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248440 (or 248434 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 6665244138 is about 81640.9464545825. The cubic root of 6665244138 is about 1881.9381831668.

The spelling of 6665244138 in words is "six billion, six hundred sixty-five million, two hundred forty-four thousand, one hundred thirty-eight".