85665437 has 32 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 69189120.

The previous prime is 85665407. The next prime is 85665439. The reversal of 85665437 is 73456658.

It is a de Polignac number, because none of the positive numbers 2^k-85665437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85665439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674468 + ... + 674594.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^85665437 is an apocalyptic number.

It is an amenable number.

85665437 is a deficient number, since it is larger than the sum of its proper divisors (18844003).

85665437 is a wasteful number, since it uses less digits than its factorization.

85665437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its digits is 604800, while the sum is 44.

The square root of 85665437 is about 9255.5624896599. The cubic root of 85665437 is about 440.8273637277.

The spelling of 85665437 in words is "eighty-five million, six hundred sixty-five thousand, four hundred thirty-seven".