68655668 has 12 divisors (see below), whose sum is σ = 121498020. Its totient is φ = 33941952.

The previous prime is 68655647. The next prime is 68655677. The reversal of 68655668 is 86655686.

It can be written as a sum of positive squares in 2 ways, for example, as 31225744 + 37429924 = 5588^2 + 6118^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96071 + ... + 96782.

It is an arithmetic number, because the mean of its divisors is an integer number (10124835).

Almost surely, 2^68655668 is an apocalyptic number.

It is an amenable number.

68655668 is a deficient number, since it is larger than the sum of its proper divisors (52842352).

68655668 is a wasteful number, since it uses less digits than its factorization.

68655668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192946 (or 192944 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 50.

The square root of 68655668 is about 8285.8715896398. The cubic root of 68655668 is about 409.4731841726.

The spelling of 68655668 in words is "sixty-eight million, six hundred fifty-five thousand, six hundred sixty-eight".