65478 has 16 divisors (see below), whose sum is σ = 149760. Its totient is φ = 18696.

The previous prime is 65449. The next prime is 65479. The reversal of 65478 is 87456.

It is a happy number.

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

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65478.

It is not an unprimeable number, because it can be changed into a prime (65479) 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, 738 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (9360).

65478 is a Friedman number, since it can be written as 7-65+4^8, using all its digits and the basic arithmetic operations.

2⁶⁵⁴⁷⁸ is an apocalyptic number.

65478 is an abundant number, since it is smaller than the sum of its proper divisors (84282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74880).

65478 is a wasteful number, since it uses less digits than its factorization.

65478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its digits is 6720, while the sum is 30.

The square root of 65478 is about 255.8866936751. The cubic root of 65478 is about 40.3055763003.

It can be divided in two parts, 6547 and 8, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 65478 in words is "sixty-five thousand, four hundred seventy-eight".