68666670 has 64 divisors (see below), whose sum is σ = 183997440. Its totient is φ = 18222624.

The previous prime is 68666651. The next prime is 68666681. The reversal of 68666670 is 7666686.

It is a happy number.

It is a super-2 number, since 2×68666670² = 9430223137777800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 70527 + ... + 71493.

It is an arithmetic number, because the mean of its divisors is an integer number (2874960).

Almost surely, 2^68666670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68666670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91998720).

68666670 is an abundant number, since it is smaller than the sum of its proper divisors (115330770).

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

68666670 is a wasteful number, since it uses less digits than its factorization.

68666670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 68666670 is about 8286.5354642335. The cubic root of 68666670 is about 409.4950555562.

The spelling of 68666670 in words is "sixty-eight million, six hundred sixty-six thousand, six hundred seventy".