66904105 has 8 divisors (see below), whose sum is σ = 80430912. Its totient is φ = 53425968.

The previous prime is 66904099. The next prime is 66904121. The reversal of 66904105 is 50140966.

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

It is a cyclic number.

It is not a de Polignac number, because 66904105 - 2⁹ = 66903593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9069 + ... + 14698.

It is an arithmetic number, because the mean of its divisors is an integer number (10053864).

Almost surely, 2^66904105 is an apocalyptic number.

It is an amenable number.

66904105 is a deficient number, since it is larger than the sum of its proper divisors (13526807).

66904105 is a wasteful number, since it uses less digits than its factorization.

66904105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24335.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 66904105 is about 8179.4929549453. The cubic root of 66904105 is about 405.9609453078.

The spelling of 66904105 in words is "sixty-six million, nine hundred four thousand, one hundred five".