65612 has 12 divisors (see below), whose sum is σ = 117600. Its totient is φ = 32016.

The previous prime is 65609. The next prime is 65617. The reversal of 65612 is 21656.

It is an alternating number because its digits alternate between even and odd.

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 3 ways as a sum of consecutive naturals, for example, 14 + ... + 362.

It is an arithmetic number, because the mean of its divisors is an integer number (9800).

2⁶⁵⁶¹² is an apocalyptic number.

It is an amenable number.

65612 is a deficient number, since it is larger than the sum of its proper divisors (51988).

65612 is a wasteful number, since it uses less digits than its factorization.

65612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 398 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 65612 is about 256.1483944904. The cubic root of 65612 is about 40.3330525370. Note that the first 3 decimals are identical.

Subtracting from 65612 its reverse (21656), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 65612 in words is "sixty-five thousand, six hundred twelve".