971880665331 has 4 divisors (see below), whose sum is σ = 1295840887112. Its totient is φ = 647920443552.

The previous prime is 971880665299. The next prime is 971880665443. The reversal of 971880665331 is 133566088179.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 971880665331 - 2⁵ = 971880665299 is a prime.

It is a super-2 number, since 2×971880665331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971880665531) 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 3 ways as a sum of consecutive naturals, for example, 161980110886 + ... + 161980110891.

It is an arithmetic number, because the mean of its divisors is an integer number (323960221778).

Almost surely, 2^971880665331 is an apocalyptic number.

971880665331 is a deficient number, since it is larger than the sum of its proper divisors (323960221781).

971880665331 is a wasteful number, since it uses less digits than its factorization.

971880665331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323960221780.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 971880665331 in words is "nine hundred seventy-one billion, eight hundred eighty million, six hundred sixty-five thousand, three hundred thirty-one".