66735622008 has 160 divisors (see below), whose sum is σ = 215909757360. Its totient is φ = 19033297920.

The previous prime is 66735621989. The next prime is 66735622013. The reversal of 66735622008 is 80022653766.

It is a happy number.

66735622008 is a `hidden beast` number, since 6 + 67 + 3 + 562 + 20 + 0 + 8 = 666.

66735622008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 154191 + ... + 396542.

Almost surely, 2^66735622008 is an apocalyptic number.

66735622008 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66735622008 is an abundant number, since it is smaller than the sum of its proper divisors (149174135352).

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

66735622008 is a wasteful number, since it uses less digits than its factorization.

66735622008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550779 (or 550766 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 66735622008 in words is "sixty-six billion, seven hundred thirty-five million, six hundred twenty-two thousand, eight".