66635208606 has 32 divisors (see below), whose sum is σ = 137882858400. Its totient is φ = 21443184000.

The previous prime is 66635208589. The next prime is 66635208623. The reversal of 66635208606 is 60680253666.

It is an interprime number because it is at equal distance from previous prime (66635208589) and next prime (66635208623).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1808940 + ... + 1845408.

It is an arithmetic number, because the mean of its divisors is an integer number (4308839325).

Almost surely, 2^66635208606 is an apocalyptic number.

66635208606 is an abundant number, since it is smaller than the sum of its proper divisors (71247649794).

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

66635208606 is a wasteful number, since it uses less digits than its factorization.

66635208606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47004.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 66635208606 in words is "sixty-six billion, six hundred thirty-five million, two hundred eight thousand, six hundred six".