665876973 has 8 divisors (see below), whose sum is σ = 908483488. Its totient is φ = 433594224.

The previous prime is 665876947. The next prime is 665876999. The reversal of 665876973 is 379678566.

It is an interprime number because it is at equal distance from previous prime (665876947) and next prime (665876999).

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

It is not a de Polignac number, because 665876973 - 2⁶ = 665876909 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 (665876903) 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, 2580790 + ... + 2581047.

It is an arithmetic number, because the mean of its divisors is an integer number (113560436).

Almost surely, 2^665876973 is an apocalyptic number.

It is an amenable number.

665876973 is a deficient number, since it is larger than the sum of its proper divisors (242606515).

665876973 is a wasteful number, since it uses less digits than its factorization.

665876973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5161883.

The product of its digits is 11430720, while the sum is 57.

The square root of 665876973 is about 25804.5920913313. The cubic root of 665876973 is about 873.2353979717.

The spelling of 665876973 in words is "six hundred sixty-five million, eight hundred seventy-six thousand, nine hundred seventy-three".