85157665 has 8 divisors (see below), whose sum is σ = 102242088. Its totient is φ = 68090880.

The previous prime is 85157627. The next prime is 85157669. The reversal of 85157665 is 56675158.

It can be written as a sum of positive squares in 4 ways, for example, as 1681 + 85155984 = 41^2 + 9228^2 .

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

It is not a de Polignac number, because 85157665 - 2⁹ = 85157153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85157669) 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, 11329 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (12780261).

Almost surely, 2^85157665 is an apocalyptic number.

It is an amenable number.

85157665 is a deficient number, since it is larger than the sum of its proper divisors (17084423).

85157665 is a wasteful number, since it uses less digits than its factorization.

85157665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819.

The product of its digits is 252000, while the sum is 43.

The square root of 85157665 is about 9228.0910810416. The cubic root of 85157665 is about 439.9546526957.

The spelling of 85157665 in words is "eighty-five million, one hundred fifty-seven thousand, six hundred sixty-five".