6665750665 has 24 divisors (see below), whose sum is σ = 9446051520. Its totient is φ = 4423332960.

The previous prime is 6665750657. The next prime is 6665750713. The reversal of 6665750665 is 5660575666.

It is not a de Polignac number, because 6665750665 - 2³ = 6665750657 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, 65455 + ... + 132724.

It is an arithmetic number, because the mean of its divisors is an integer number (393585480).

Almost surely, 2^6665750665 is an apocalyptic number.

It is an amenable number.

6665750665 is a deficient number, since it is larger than the sum of its proper divisors (2780300855).

6665750665 is a wasteful number, since it uses less digits than its factorization.

6665750665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198253 (or 198222 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 52.

The square root of 6665750665 is about 81644.0485583609. The cubic root of 6665750665 is about 1881.9858547567.

The spelling of 6665750665 in words is "six billion, six hundred sixty-five million, seven hundred fifty thousand, six hundred sixty-five".