68845666 has 12 divisors (see below), whose sum is σ = 105731622. Its totient is φ = 33620496.

The previous prime is 68845663. The next prime is 68845669. The reversal of 68845666 is 66654886.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68845663) and next prime (68845669).

It can be written as a sum of positive squares in only one way, i.e., 39955041 + 28890625 = 6321^2 + 5375^2 .

It is not an unprimeable number, because it can be changed into a prime (68845661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5611 + ... + 13006.

Almost surely, 2^68845666 is an apocalyptic number.

68845666 is a deficient number, since it is larger than the sum of its proper divisors (36885956).

68845666 is a wasteful number, since it uses less digits than its factorization.

68845666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18705 (or 18662 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The square root of 68845666 is about 8297.3288472857. The cubic root of 68845666 is about 409.8505622356.

The spelling of 68845666 in words is "sixty-eight million, eight hundred forty-five thousand, six hundred sixty-six".