65657256 has 96 divisors (see below), whose sum is σ = 197210880. Its totient is φ = 18144000.

The previous prime is 65657237. The next prime is 65657257. The reversal of 65657256 is 65275656.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (65657257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35556 + ... + 37356.

It is an arithmetic number, because the mean of its divisors is an integer number (2054280).

Almost surely, 2^65657256 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 65657256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98605440).

65657256 is an abundant number, since it is smaller than the sum of its proper divisors (131553624).

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

65657256 is a wasteful number, since it uses less digits than its factorization.

65657256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855 (or 1844 counting only the distinct ones).

The product of its digits is 378000, while the sum is 42.

The square root of 65657256 is about 8102.9165119727. The cubic root of 65657256 is about 403.4232367189.

The spelling of 65657256 in words is "sixty-five million, six hundred fifty-seven thousand, two hundred fifty-six".