68665628 has 6 divisors (see below), whose sum is σ = 120164856. Its totient is φ = 34332812.

The previous prime is 68665609. The next prime is 68665643. The reversal of 68665628 is 82656686.

It is a happy number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 8583200 + ... + 8583207.

It is an arithmetic number, because the mean of its divisors is an integer number (20027476).

Almost surely, 2^68665628 is an apocalyptic number.

It is an amenable number.

68665628 is a deficient number, since it is larger than the sum of its proper divisors (51499228).

68665628 is a wasteful number, since it uses less digits than its factorization.

68665628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17166411 (or 17166409 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 68665628 is about 8286.4725909159. The cubic root of 68665628 is about 409.4929842165.

The spelling of 68665628 in words is "sixty-eight million, six hundred sixty-five thousand, six hundred twenty-eight".