66705604 has 24 divisors (see below), whose sum is σ = 134120448. Its totient is φ = 28436160.

The previous prime is 66705601. The next prime is 66705629. The reversal of 66705604 is 40650766.

It is a self number, because there is not a number n which added to its sum of digits gives 66705604.

It is not an unprimeable number, because it can be changed into a prime (66705601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889 + ... + 11584.

It is an arithmetic number, because the mean of its divisors is an integer number (5588352).

Almost surely, 2^66705604 is an apocalyptic number.

It is an amenable number.

66705604 is an abundant number, since it is smaller than the sum of its proper divisors (67414844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66705604 is a wasteful number, since it uses less digits than its factorization.

66705604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12675 (or 12673 counting only the distinct ones).

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

The square root of 66705604 is about 8167.3498761838. The cubic root of 66705604 is about 405.5590592498.

The spelling of 66705604 in words is "sixty-six million, seven hundred five thousand, six hundred four".