68220164 has 6 divisors (see below), whose sum is σ = 119385294. Its totient is φ = 34110080.

The previous prime is 68220149. The next prime is 68220221. The reversal of 68220164 is 46102286.

It can be written as a sum of positive squares in only one way, i.e., 68194564 + 25600 = 8258^2 + 160^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8527517 + ... + 8527524.

It is an arithmetic number, because the mean of its divisors is an integer number (19897549).

Almost surely, 2^68220164 is an apocalyptic number.

It is an amenable number.

68220164 is a deficient number, since it is larger than the sum of its proper divisors (51165130).

68220164 is a wasteful number, since it uses less digits than its factorization.

68220164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17055045 (or 17055043 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 68220164 is about 8259.5498666695. The cubic root of 68220164 is about 408.6055422592.

The spelling of 68220164 in words is "sixty-eight million, two hundred twenty thousand, one hundred sixty-four".