68026666 has 8 divisors (see below), whose sum is σ = 103965444. Its totient is φ = 33371520.

The previous prime is 68026657. The next prime is 68026697. The reversal of 68026666 is 66662086.

It can be written as a sum of positive squares in 2 ways, for example, as 66080641 + 1946025 = 8129^2 + 1395^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320775 + ... + 320986.

Almost surely, 2^68026666 is an apocalyptic number.

68026666 is a deficient number, since it is larger than the sum of its proper divisors (35938778).

68026666 is a wasteful number, since it uses less digits than its factorization.

68026666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641816.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 68026666 is about 8247.8279564986. The cubic root of 68026666 is about 408.2188568539.

The spelling of 68026666 in words is "sixty-eight million, twenty-six thousand, six hundred sixty-six".