66750478 has 8 divisors (see below), whose sum is σ = 100249272. Its totient is φ = 33334056.

The previous prime is 66750469. The next prime is 66750499. The reversal of 66750478 is 87405766.

66750478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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 3 ways as a sum of consecutive naturals, for example, 18525 + ... + 21832.

It is an arithmetic number, because the mean of its divisors is an integer number (12531159).

Almost surely, 2^66750478 is an apocalyptic number.

66750478 is a deficient number, since it is larger than the sum of its proper divisors (33498794).

66750478 is a wasteful number, since it uses less digits than its factorization.

66750478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41186.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 66750478 is about 8170.0965722567. The cubic root of 66750478 is about 405.6499810351.

The spelling of 66750478 in words is "sixty-six million, seven hundred fifty thousand, four hundred seventy-eight".