971567665 has 8 divisors (see below), whose sum is σ = 1168515648. Its totient is φ = 775497840.

The previous prime is 971567627. The next prime is 971567677. The reversal of 971567665 is 566765179.

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 971567665 - 2¹³ = 971559473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217101 + ... + 221530.

It is an arithmetic number, because the mean of its divisors is an integer number (146064456).

Almost surely, 2^971567665 is an apocalyptic number.

It is an amenable number.

971567665 is a deficient number, since it is larger than the sum of its proper divisors (196947983).

971567665 is a wasteful number, since it uses less digits than its factorization.

971567665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439079.

The product of its digits is 2381400, while the sum is 52.

The square root of 971567665 is about 31169.9801892783. The cubic root of 971567665 is about 990.4312867650.

The spelling of 971567665 in words is "nine hundred seventy-one million, five hundred sixty-seven thousand, six hundred sixty-five".