67320565 has 16 divisors (see below), whose sum is σ = 89124336. Its totient is φ = 48499200.

The previous prime is 67320557. The next prime is 67320569. The reversal of 67320565 is 56502376.

It can be written as a sum of positive squares in 8 ways, for example, as 31787044 + 35533521 = 5638^2 + 5961^2 .

It is not a de Polignac number, because 67320565 - 2³ = 67320557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67320565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67320569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9966 + ... + 15295.

It is an arithmetic number, because the mean of its divisors is an integer number (5570271).

Almost surely, 2^67320565 is an apocalyptic number.

67320565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67320565 is a deficient number, since it is larger than the sum of its proper divisors (21803771).

67320565 is a wasteful number, since it uses less digits than its factorization.

67320565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25320.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 67320565 is about 8204.9110293775. The cubic root of 67320565 is about 406.8015360091.

The spelling of 67320565 in words is "sixty-seven million, three hundred twenty thousand, five hundred sixty-five".