68086660 has 24 divisors (see below), whose sum is σ = 146847960. Its totient is φ = 26498304.

The previous prime is 68086651. The next prime is 68086663. The reversal of 68086660 is 6668086.

It can be written as a sum of positive squares in 4 ways, for example, as 16016004 + 52070656 = 4002^2 + 7216^2 .

It is not an unprimeable number, because it can be changed into a prime (68086663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45265 + ... + 46744.

It is an arithmetic number, because the mean of its divisors is an integer number (6118665).

Almost surely, 2^68086660 is an apocalyptic number.

It is an amenable number.

68086660 is an abundant number, since it is smaller than the sum of its proper divisors (78761300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68086660 is a wasteful number, since it uses less digits than its factorization.

68086660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92055 (or 92053 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 68086660 is about 8251.4641125075. The cubic root of 68086660 is about 408.3388268963.

The spelling of 68086660 in words is "sixty-eight million, eighty-six thousand, six hundred sixty".