67320655 has 16 divisors (see below), whose sum is σ = 85100544. Its totient is φ = 51024160.

The previous prime is 67320607. The next prime is 67320661. The reversal of 67320655 is 55602376.

It is a de Polignac number, because none of the positive numbers 2^k-67320655 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 67320655.

It is a congruent number.

It is an unprimeable number.

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, 9570 + ... + 15040.

It is an arithmetic number, because the mean of its divisors is an integer number (5318784).

Almost surely, 2^67320655 is an apocalyptic number.

67320655 is a deficient number, since it is larger than the sum of its proper divisors (17779889).

67320655 is a wasteful number, since it uses less digits than its factorization.

67320655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606.

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

The square root of 67320655 is about 8204.9165138958. The cubic root of 67320655 is about 406.8017172916.

The spelling of 67320655 in words is "sixty-seven million, three hundred twenty thousand, six hundred fifty-five".