66707078 has 8 divisors (see below), whose sum is σ = 102765072. Its totient is φ = 32452056.

The previous prime is 66707077. The next prime is 66707083. The reversal of 66707078 is 87070766.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66707077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450650 + ... + 450797.

It is an arithmetic number, because the mean of its divisors is an integer number (12845634).

Almost surely, 2^66707078 is an apocalyptic number.

66707078 is a deficient number, since it is larger than the sum of its proper divisors (36057994).

66707078 is a wasteful number, since it uses less digits than its factorization.

66707078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901486.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 66707078 is about 8167.4401130342. The cubic root of 66707078 is about 405.5620464534.

The spelling of 66707078 in words is "sixty-six million, seven hundred seven thousand, seventy-eight".