67316720 has 20 divisors (see below), whose sum is σ = 156511560. Its totient is φ = 26926656.

The previous prime is 67316713. The next prime is 67316749. The reversal of 67316720 is 2761376.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 420650 + ... + 420809.

It is an arithmetic number, because the mean of its divisors is an integer number (7825578).

Almost surely, 2^67316720 is an apocalyptic number.

It is an amenable number.

67316720 is an abundant number, since it is smaller than the sum of its proper divisors (89194840).

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

67316720 is a wasteful number, since it uses less digits than its factorization.

67316720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841472 (or 841466 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 67316720 is about 8204.6767151424. The cubic root of 67316720 is about 406.7937910668.

The spelling of 67316720 in words is "sixty-seven million, three hundred sixteen thousand, seven hundred twenty".