68218660 has 12 divisors (see below), whose sum is σ = 143259228. Its totient is φ = 27287456.

The previous prime is 68218649. The next prime is 68218687. The reversal of 68218660 is 6681286.

It can be written as a sum of positive squares in 2 ways, for example, as 19554084 + 48664576 = 4422^2 + 6976^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705447 + ... + 1705486.

It is an arithmetic number, because the mean of its divisors is an integer number (11938269).

Almost surely, 2^68218660 is an apocalyptic number.

It is an amenable number.

68218660 is an abundant number, since it is smaller than the sum of its proper divisors (75040568).

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

68218660 is a wasteful number, since it uses less digits than its factorization.

68218660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410942 (or 3410940 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 68218660 is about 8259.4588200438. The cubic root of 68218660 is about 408.6025394947.

The spelling of 68218660 in words is "sixty-eight million, two hundred eighteen thousand, six hundred sixty".