65771328 has 84 divisors (see below), whose sum is σ = 202460352. Its totient is φ = 18789120.

The previous prime is 65771327. The next prime is 65771353. The reversal of 65771328 is 82317756.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65771323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5913 + ... + 12903.

Almost surely, 2^65771328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65771328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101230176).

65771328 is an abundant number, since it is smaller than the sum of its proper divisors (136689024).

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

65771328 is a wasteful number, since it uses less digits than its factorization.

65771328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020 (or 7003 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 65771328 is about 8109.9524042993. The cubic root of 65771328 is about 403.6567355118.

The spelling of 65771328 in words is "sixty-five million, seven hundred seventy-one thousand, three hundred twenty-eight".