66100553144 has 32 divisors (see below), whose sum is σ = 133705073520. Its totient is φ = 30519230976.

The previous prime is 66100553131. The next prime is 66100553159. The reversal of 66100553144 is 44135500166.

It is a congruent number.

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, 4578014 + ... + 4592429.

Almost surely, 2^66100553144 is an apocalyptic number.

It is an amenable number.

66100553144 is an abundant number, since it is smaller than the sum of its proper divisors (67604520376).

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

66100553144 is a wasteful number, since it uses less digits than its factorization.

66100553144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170519 (or 9170515 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 66100553144 in words is "sixty-six billion, one hundred million, five hundred fifty-three thousand, one hundred forty-four".