67216064 has 28 divisors (see below), whose sum is σ = 135218424. Its totient is φ = 33145344.

The previous prime is 67216057. The next prime is 67216067. The reversal of 67216064 is 46061276.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 67216064.

It is not an unprimeable number, because it can be changed into a prime (67216067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522 + ... + 11865.

Almost surely, 2^67216064 is an apocalyptic number.

67216064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67216064 is an abundant number, since it is smaller than the sum of its proper divisors (68002360).

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

67216064 is a wasteful number, since it uses less digits than its factorization.

67216064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14472 (or 14462 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 67216064 is about 8198.5403578930. The cubic root of 67216064 is about 406.5909357621.

The spelling of 67216064 in words is "sixty-seven million, two hundred sixteen thousand, sixty-four".