65897985 has 32 divisors (see below), whose sum is σ = 112896000. Its totient is φ = 32723136.

The previous prime is 65897981. The next prime is 65897987. The reversal of 65897985 is 58979856.

It is not a de Polignac number, because 65897985 - 2² = 65897981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (65897981) 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, 14856 + ... + 18774.

It is an arithmetic number, because the mean of its divisors is an integer number (3528000).

Almost surely, 2^65897985 is an apocalyptic number.

It is an amenable number.

65897985 is a deficient number, since it is larger than the sum of its proper divisors (46998015).

65897985 is a wasteful number, since it uses less digits than its factorization.

65897985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005.

The product of its digits is 5443200, while the sum is 57.

The square root of 65897985 is about 8117.7573873577. The cubic root of 65897985 is about 403.9156789842.

The spelling of 65897985 in words is "sixty-five million, eight hundred ninety-seven thousand, nine hundred eighty-five".