66704605 has 8 divisors (see below), whose sum is σ = 87322464. Its totient is φ = 48512400.

The previous prime is 66704579. The next prime is 66704629. The reversal of 66704605 is 50640766.

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

It is not a de Polignac number, because 66704605 - 2¹⁵ = 66671837 is a prime.

It is a Duffinian number.

It is a congruent 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, 606351 + ... + 606460.

It is an arithmetic number, because the mean of its divisors is an integer number (10915308).

Almost surely, 2^66704605 is an apocalyptic number.

It is an amenable number.

66704605 is a deficient number, since it is larger than the sum of its proper divisors (20617859).

66704605 is a wasteful number, since it uses less digits than its factorization.

66704605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212827.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66704605 is about 8167.2887178059. The cubic root of 66704605 is about 405.5570346547.

The spelling of 66704605 in words is "sixty-six million, seven hundred four thousand, six hundred five".