66604478 has 8 divisors (see below), whose sum is σ = 99941472. Its totient is φ = 33290656.

The previous prime is 66604427. The next prime is 66604501. The reversal of 66604478 is 87440666.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7451 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (12492684).

Almost surely, 2^66604478 is an apocalyptic number.

66604478 is a deficient number, since it is larger than the sum of its proper divisors (33336994).

66604478 is a wasteful number, since it uses less digits than its factorization.

66604478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11586.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 66604478 is about 8161.1566582195. The cubic root of 66604478 is about 405.3540124696.

The spelling of 66604478 in words is "sixty-six million, six hundred four thousand, four hundred seventy-eight".