66166650100 has 18 divisors (see below), whose sum is σ = 143581630934. Its totient is φ = 26466660000.

The previous prime is 66166650089. The next prime is 66166650119. The reversal of 66166650100 is 105666166.

It can be written as a sum of positive squares in 3 ways, for example, as 19983780496 + 46182869604 = 141364^2 + 214902^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66166650100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330833151 + ... + 330833350.

Almost surely, 2^66166650100 is an apocalyptic number.

It is an amenable number.

66166650100 is an abundant number, since it is smaller than the sum of its proper divisors (77414980834).

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

66166650100 is a wasteful number, since it uses less digits than its factorization.

66166650100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661666515 (or 661666508 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 66166650100 in words is "sixty-six billion, one hundred sixty-six million, six hundred fifty thousand, one hundred".