66605001608 has 32 divisors (see below), whose sum is σ = 125973675360. Its totient is φ = 33013284480.

The previous prime is 66605001587. The next prime is 66605001613. The reversal of 66605001608 is 80610050666.

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, 344423 + ... + 501833.

It is an arithmetic number, because the mean of its divisors is an integer number (3936677355).

Almost surely, 2^66605001608 is an apocalyptic number.

It is an amenable number.

66605001608 is a deficient number, since it is larger than the sum of its proper divisors (59368673752).

66605001608 is a wasteful number, since it uses less digits than its factorization.

66605001608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157877 (or 157873 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 66605001608 in words is "sixty-six billion, six hundred five million, one thousand, six hundred eight".