68352661 has 8 divisors (see below), whose sum is σ = 73919384. Its totient is φ = 62830080.

The previous prime is 68352611. The next prime is 68352673. The reversal of 68352661 is 16625386.

It can be written as a sum of positive squares in 4 ways, for example, as 11350161 + 57002500 = 3369^2 + 7550^2 .

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 68352661 - 2⁷ = 68352533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68352661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68352611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7776 + ... + 14041.

It is an arithmetic number, because the mean of its divisors is an integer number (9239923).

Almost surely, 2^68352661 is an apocalyptic number.

It is an amenable number.

68352661 is a deficient number, since it is larger than the sum of its proper divisors (5566723).

68352661 is a wasteful number, since it uses less digits than its factorization.

68352661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22071.

The product of its digits is 51840, while the sum is 37.

The square root of 68352661 is about 8267.5668125513. The cubic root of 68352661 is about 408.8699020104.

The spelling of 68352661 in words is "sixty-eight million, three hundred fifty-two thousand, six hundred sixty-one".