6660165247 has 8 divisors (see below), whose sum is σ = 7021823360. Its totient is φ = 6299619480.

The previous prime is 6660165241. The next prime is 6660165251. The reversal of 6660165247 is 7425610666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6660165247 is a prime.

It is a super-2 number, since 2×6660165247² = 88715602234693142018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660165241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265773 + ... + 289750.

It is an arithmetic number, because the mean of its divisors is an integer number (877727920).

Almost surely, 2^6660165247 is an apocalyptic number.

6660165247 is a deficient number, since it is larger than the sum of its proper divisors (361658113).

6660165247 is a wasteful number, since it uses less digits than its factorization.

6660165247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556173.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 6660165247 is about 81609.8354795548. The cubic root of 6660165247 is about 1881.4600517590.

The spelling of 6660165247 in words is "six billion, six hundred sixty million, one hundred sixty-five thousand, two hundred forty-seven".