660766372971 has 8 divisors (see below), whose sum is σ = 882161577360. Its totient is φ = 439941041952.

The previous prime is 660766372913. The next prime is 660766372979. The reversal of 660766372971 is 179273667066.

It is a happy number.

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

It is not a de Polignac number, because 660766372971 - 2⁷ = 660766372843 is a prime.

It is a super-2 number, since 2×660766372971² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660766372979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142465636 + ... + 142470273.

It is an arithmetic number, because the mean of its divisors is an integer number (110270197170).

Almost surely, 2^660766372971 is an apocalyptic number.

660766372971 is a deficient number, since it is larger than the sum of its proper divisors (221395204389).

660766372971 is a wasteful number, since it uses less digits than its factorization.

660766372971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284936685.

The product of its (nonzero) digits is 24004512, while the sum is 60.

The spelling of 660766372971 in words is "six hundred sixty billion, seven hundred sixty-six million, three hundred seventy-two thousand, nine hundred seventy-one".