67399712 has 48 divisors (see below), whose sum is σ = 139708800. Its totient is φ = 31960320.

The previous prime is 67399711. The next prime is 67399721. The reversal of 67399712 is 21799376.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67399711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54137 + ... + 55367.

It is an arithmetic number, because the mean of its divisors is an integer number (2910600).

Almost surely, 2^67399712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67399712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69854400).

67399712 is an abundant number, since it is smaller than the sum of its proper divisors (72309088).

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

67399712 is a wasteful number, since it uses less digits than its factorization.

67399712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1321 counting only the distinct ones).

The product of its digits is 142884, while the sum is 44.

The square root of 67399712 is about 8209.7327605714. The cubic root of 67399712 is about 406.9608954938.

The spelling of 67399712 in words is "sixty-seven million, three hundred ninety-nine thousand, seven hundred twelve".