65726464 has 48 divisors (see below), whose sum is σ = 133660800. Its totient is φ = 32305152.

The previous prime is 65726449. The next prime is 65726483. The reversal of 65726464 is 46462756.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136977 + ... + 137455.

It is an arithmetic number, because the mean of its divisors is an integer number (2784600).

Almost surely, 2^65726464 is an apocalyptic number.

65726464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65726464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66830400).

65726464 is an abundant number, since it is smaller than the sum of its proper divisors (67934336).

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

65726464 is an equidigital number, since it uses as much as digits as its factorization.

65726464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 548 counting only the distinct ones).

The product of its digits is 241920, while the sum is 40.

The square root of 65726464 is about 8107.1859482807. The cubic root of 65726464 is about 403.5649337315.

The spelling of 65726464 in words is "sixty-five million, seven hundred twenty-six thousand, four hundred sixty-four".