66200550172 has 12 divisors (see below), whose sum is σ = 115857911176. Its totient is φ = 33098289840.

The previous prime is 66200550167. The next prime is 66200550179. The reversal of 66200550172 is 27105500266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66200550179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419979 + ... + 555682.

Almost surely, 2^66200550172 is an apocalyptic number.

It is an amenable number.

66200550172 is a deficient number, since it is larger than the sum of its proper divisors (49657361004).

66200550172 is a wasteful number, since it uses less digits than its factorization.

66200550172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992628 (or 992626 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 66200550172 in words is "sixty-six billion, two hundred million, five hundred fifty thousand, one hundred seventy-two".