68888682061 has 4 divisors (see below), whose sum is σ = 68908543900. Its totient is φ = 68868820224.

The previous prime is 68888682041. The next prime is 68888682091. The reversal of 68888682061 is 16028688886.

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 21942793161 + 46945888900 = 148131^2 + 216670^2 .

It is a cyclic number.

It is not a de Polignac number, because 68888682061 - 2⁷ = 68888681933 is a prime.

It is a super-2 number, since 2×68888682061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68888682011) 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, 9925716 + ... + 9932653.

It is an arithmetic number, because the mean of its divisors is an integer number (17227135975).

Almost surely, 2^68888682061 is an apocalyptic number.

It is an amenable number.

68888682061 is a deficient number, since it is larger than the sum of its proper divisors (19861839).

68888682061 is a wasteful number, since it uses less digits than its factorization.

68888682061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19861838.

The product of its (nonzero) digits is 14155776, while the sum is 61.

The spelling of 68888682061 in words is "sixty-eight billion, eight hundred eighty-eight million, six hundred eighty-two thousand, sixty-one".