665119849 has 8 divisors (see below), whose sum is σ = 726962688. Its totient is φ = 605801280.

The previous prime is 665119841. The next prime is 665119879. The reversal of 665119849 is 948911566.

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

It is a cyclic number.

It is not a de Polignac number, because 665119849 - 2³ = 665119841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665119841) 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, 630517 + ... + 631570.

It is an arithmetic number, because the mean of its divisors is an integer number (90870336).

Almost surely, 2^665119849 is an apocalyptic number.

It is an amenable number.

665119849 is a deficient number, since it is larger than the sum of its proper divisors (61842839).

665119849 is a wasteful number, since it uses less digits than its factorization.

665119849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262135.

The product of its digits is 466560, while the sum is 49.

The square root of 665119849 is about 25789.9175842033. The cubic root of 665119849 is about 872.9043066717.

The spelling of 665119849 in words is "six hundred sixty-five million, one hundred nineteen thousand, eight hundred forty-nine".