85797665 has 8 divisors (see below), whose sum is σ = 103076160. Its totient is φ = 68558832.

The previous prime is 85797653. The next prime is 85797667. The reversal of 85797665 is 56679758.

It is a happy number.

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 85797665 - 2⁸ = 85797409 is a prime.

It is a super-2 number, since 2×85797665² = 14722478638904450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85797667) 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, 4925 + ... + 13994.

It is an arithmetic number, because the mean of its divisors is an integer number (12884520).

Almost surely, 2^85797665 is an apocalyptic number.

It is an amenable number.

85797665 is a deficient number, since it is larger than the sum of its proper divisors (17278495).

85797665 is a wasteful number, since it uses less digits than its factorization.

85797665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19831.

The product of its digits is 3175200, while the sum is 53.

The square root of 85797665 is about 9262.7028992622. The cubic root of 85797665 is about 441.0540586374.

The spelling of 85797665 in words is "eighty-five million, seven hundred ninety-seven thousand, six hundred sixty-five".