68071778 has 8 divisors (see below), whose sum is σ = 103118940. Its totient is φ = 33698800.

The previous prime is 68071777. The next prime is 68071793. The reversal of 68071778 is 87717086.

It can be written as a sum of positive squares in 2 ways, for example, as 62932489 + 5139289 = 7933^2 + 2267^2 .

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

It is not an unprimeable number, because it can be changed into a prime (68071771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168293 + ... + 168696.

Almost surely, 2^68071778 is an apocalyptic number.

68071778 is a deficient number, since it is larger than the sum of its proper divisors (35047162).

68071778 is a wasteful number, since it uses less digits than its factorization.

68071778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337092.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 68071778 is about 8250.5622838689. The cubic root of 68071778 is about 408.3090739255.

The spelling of 68071778 in words is "sixty-eight million, seventy-one thousand, seven hundred seventy-eight".