665876071 has 8 divisors (see below), whose sum is σ = 801054080. Its totient is φ = 540711288.

The previous prime is 665876053. The next prime is 665876137. The reversal of 665876071 is 170678566.

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 665876071 - 2⁷ = 665875943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665876051) 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, 2503161 + ... + 2503426.

It is an arithmetic number, because the mean of its divisors is an integer number (100131760).

Almost surely, 2^665876071 is an apocalyptic number.

665876071 is a deficient number, since it is larger than the sum of its proper divisors (135178009).

665876071 is a wasteful number, since it uses less digits than its factorization.

665876071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006613.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 665876071 is about 25804.5746138161. The cubic root of 665876071 is about 873.2350036753.

The spelling of 665876071 in words is "six hundred sixty-five million, eight hundred seventy-six thousand, seventy-one".