68066730 has 56 divisors (see below), whose sum is σ = 183715812. Its totient is φ = 18149184.

The previous prime is 68066711. The next prime is 68066737. The reversal of 68066730 is 3766086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65173329 + 2893401 = 8073^2 + 1701^2 .

It is not an unprimeable number, because it can be changed into a prime (68066737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2622 + ... + 11958.

Almost surely, 2^68066730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68066730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91857906).

68066730 is an abundant number, since it is smaller than the sum of its proper divisors (115649082).

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

68066730 is an equidigital number, since it uses as much as digits as its factorization.

68066730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9362 (or 9347 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 68066730 is about 8250.2563596533. The cubic root of 68066730 is about 408.2989806817.

The spelling of 68066730 in words is "sixty-eight million, sixty-six thousand, seven hundred thirty".