68528665 has 8 divisors (see below), whose sum is σ = 83158920. Its totient is φ = 54206592.

The previous prime is 68528659. The next prime is 68528723. The reversal of 68528665 is 56682586.

It can be written as a sum of positive squares in 4 ways, for example, as 6245001 + 62283664 = 2499^2 + 7892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68528665 - 2²¹ = 66431513 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 76554 + ... + 77443.

It is an arithmetic number, because the mean of its divisors is an integer number (10394865).

Almost surely, 2^68528665 is an apocalyptic number.

It is an amenable number.

68528665 is a deficient number, since it is larger than the sum of its proper divisors (14630255).

68528665 is a wasteful number, since it uses less digits than its factorization.

68528665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154091.

The product of its digits is 691200, while the sum is 46.

The square root of 68528665 is about 8278.2042134753. The cubic root of 68528665 is about 409.2205397121.

The spelling of 68528665 in words is "sixty-eight million, five hundred twenty-eight thousand, six hundred sixty-five".