68666686 has 16 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 31176280.

The previous prime is 68666683. The next prime is 68666687.

68666686 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×68666686² = 9430227532445192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68666681) 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, 31665 + ... + 33763.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^68666686 is an apocalyptic number.

68666686 is a deficient number, since it is larger than the sum of its proper divisors (43826114).

68666686 is a wasteful number, since it uses less digits than its factorization.

68666686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599.

The product of its digits is 2985984, while the sum is 52.

The square root of 68666686 is about 8286.5364296550. The cubic root of 68666686 is about 409.4950873617.

The spelling of 68666686 in words is "sixty-eight million, six hundred sixty-six thousand, six hundred eighty-six".