68866361 has 4 divisors (see below), whose sum is σ = 70727652. Its totient is φ = 67005072.

The previous prime is 68866351. The next prime is 68866363. The reversal of 68866361 is 16366886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57684025 + 11182336 = 7595^2 + 3344^2 .

It is a cyclic number.

It is not a de Polignac number, because 68866361 - 2¹⁰ = 68865337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68866363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930590 + ... + 930663.

It is an arithmetic number, because the mean of its divisors is an integer number (17681913).

Almost surely, 2^68866361 is an apocalyptic number.

It is an amenable number.

68866361 is a deficient number, since it is larger than the sum of its proper divisors (1861291).

68866361 is a wasteful number, since it uses less digits than its factorization.

68866361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861290.

The product of its digits is 248832, while the sum is 44.

The square root of 68866361 is about 8298.5758416731. The cubic root of 68866361 is about 409.8916251334.

The spelling of 68866361 in words is "sixty-eight million, eight hundred sixty-six thousand, three hundred sixty-one".