68668945 has 16 divisors (see below), whose sum is σ = 87071040. Its totient is φ = 51845184.

The previous prime is 68668939. The next prime is 68668949. The reversal of 68668945 is 54986686.

It is a cyclic number.

It is not a de Polignac number, because 68668945 - 2⁵ = 68668913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68668892 and 68668901.

It is not an unprimeable number, because it can be changed into a prime (68668949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26602 + ... + 29068.

It is an arithmetic number, because the mean of its divisors is an integer number (5441940).

Almost surely, 2^68668945 is an apocalyptic number.

It is an amenable number.

68668945 is a deficient number, since it is larger than the sum of its proper divisors (18402095).

68668945 is a wasteful number, since it uses less digits than its factorization.

68668945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784.

The product of its digits is 2488320, while the sum is 52.

The square root of 68668945 is about 8286.6727339747. The cubic root of 68668945 is about 409.4995778422.

The spelling of 68668945 in words is "sixty-eight million, six hundred sixty-eight thousand, nine hundred forty-five".