68222666 has 8 divisors (see below), whose sum is σ = 108353700. Its totient is φ = 32104768.

The previous prime is 68222663. The next prime is 68222677. The reversal of 68222666 is 66622286.

It can be written as a sum of positive squares in 2 ways, for example, as 64722025 + 3500641 = 8045^2 + 1871^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×68222666² = 9308664312295112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68222663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1003241 + ... + 1003308.

Almost surely, 2^68222666 is an apocalyptic number.

68222666 is a deficient number, since it is larger than the sum of its proper divisors (40131034).

68222666 is a wasteful number, since it uses less digits than its factorization.

68222666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006568.

The product of its digits is 82944, while the sum is 38.

The square root of 68222666 is about 8259.7013263193. The cubic root of 68222666 is about 408.6105374517.

The spelling of 68222666 in words is "sixty-eight million, two hundred twenty-two thousand, six hundred sixty-six".