65615 has 8 divisors (see below), whose sum is σ = 85968. Its totient is φ = 47680.

The previous prime is 65609. The next prime is 65617. The reversal of 65615 is 51656.

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

It is not a de Polignac number, because 65615 - 2⁴ = 65599 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 (65617) 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, 542 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (10746).

2⁶⁵⁶¹⁵ is an apocalyptic number.

65615 is a deficient number, since it is larger than the sum of its proper divisors (20353).

65615 is a wasteful number, since it uses less digits than its factorization.

65615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its digits is 900, while the sum is 23.

The square root of 65615 is about 256.1542504039. The cubic root of 65615 is about 40.3336672483. Note that the first 3 decimals are identical.

The spelling of 65615 in words is "sixty-five thousand, six hundred fifteen".