67216320 has 84 divisors (see below), whose sum is σ = 231206040. Its totient is φ = 17923584.

The previous prime is 67216307. The next prime is 67216333. The reversal of 67216320 is 2361276.

It is a happy number.

67216320 is a `hidden beast` number, since 6 + 7 + 21 + 632 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (67216307) and next prime (67216333).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8790 + ... + 14549.

Almost surely, 2^67216320 is an apocalyptic number.

67216320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67216320 is an abundant number, since it is smaller than the sum of its proper divisors (163989720).

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

67216320 is a wasteful number, since it uses less digits than its factorization.

67216320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23362 (or 23349 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 67216320 is about 8198.5559704133. Note that the first 3 decimals coincide. The cubic root of 67216320 is about 406.5914519440.

Adding to 67216320 its reverse (2361276), we get a palindrome (69577596).

It can be divided in two parts, 6721 and 6320, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 67216320 in words is "sixty-seven million, two hundred sixteen thousand, three hundred twenty".