665008851 has 8 divisors (see below), whose sum is σ = 954884560. Its totient is φ = 409236192.

The previous prime is 665008849. The next prime is 665008859. The reversal of 665008851 is 158800566.

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

It is not a de Polignac number, because 665008851 - 2¹ = 665008849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 17051509 = 665008851 / (6 + 6 + 5 + 0 + 0 + 8 + 8 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665008859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8525716 + ... + 8525793.

It is an arithmetic number, because the mean of its divisors is an integer number (119360570).

Almost surely, 2^665008851 is an apocalyptic number.

665008851 is a deficient number, since it is larger than the sum of its proper divisors (289875709).

665008851 is a wasteful number, since it uses less digits than its factorization.

665008851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17051525.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 665008851 is about 25787.7655294134. The cubic root of 665008851 is about 872.8557459886.

The spelling of 665008851 in words is "six hundred sixty-five million, eight thousand, eight hundred fifty-one".