67664268 has 192 divisors, whose sum is σ = 214502400. Its totient is φ = 18040320.

The previous prime is 67664249. The next prime is 67664269. The reversal of 67664268 is 86246676.

It is not an unprimeable number, because it can be changed into a prime (67664269) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1146823 + ... + 1146881.

It is an arithmetic number, because the mean of its divisors is an integer number (1117200).

Almost surely, 2^67664268 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 67664268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107251200).

67664268 is an abundant number, since it is smaller than the sum of its proper divisors (146838132).

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

67664268 is a wasteful number, since it uses less digits than its factorization.

67664268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 149 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 67664268 is about 8225.8293198923. The cubic root of 67664268 is about 407.4926652550.

The spelling of 67664268 in words is "sixty-seven million, six hundred sixty-four thousand, two hundred sixty-eight".