68220066 has 16 divisors (see below), whose sum is σ = 138362688. Its totient is φ = 22419600.

The previous prime is 68220049. The next prime is 68220067. The reversal of 68220066 is 66002286.

It is not an unprimeable number, because it can be changed into a prime (68220067) 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, 79645 + ... + 80496.

It is an arithmetic number, because the mean of its divisors is an integer number (8647668).

Almost surely, 2^68220066 is an apocalyptic number.

68220066 is an abundant number, since it is smaller than the sum of its proper divisors (70142622).

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

68220066 is a wasteful number, since it uses less digits than its factorization.

68220066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160217.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 68220066 is about 8259.5439341407. The cubic root of 68220066 is about 408.6053466017.

The spelling of 68220066 in words is "sixty-eight million, two hundred twenty thousand, sixty-six".