66408604 has 6 divisors (see below), whose sum is σ = 116215064. Its totient is φ = 33204300.

The previous prime is 66408593. The next prime is 66408607. The reversal of 66408604 is 40680466.

It is a self number, because there is not a number n which added to its sum of digits gives 66408604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66408607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8301072 + ... + 8301079.

Almost surely, 2^66408604 is an apocalyptic number.

It is an amenable number.

66408604 is a deficient number, since it is larger than the sum of its proper divisors (49806460).

66408604 is a wasteful number, since it uses less digits than its factorization.

66408604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16602155 (or 16602153 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 66408604 is about 8149.1474400700. The cubic root of 66408604 is about 404.9562600733.

The spelling of 66408604 in words is "sixty-six million, four hundred eight thousand, six hundred four".