66550194102 has 32 divisors (see below), whose sum is σ = 153135648000. Its totient is φ = 18886726368.

The previous prime is 66550194097. The next prime is 66550194127. The reversal of 66550194102 is 20149105566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5310952 + ... + 5323467.

It is an arithmetic number, because the mean of its divisors is an integer number (4785489000).

Almost surely, 2^66550194102 is an apocalyptic number.

66550194102 is an abundant number, since it is smaller than the sum of its proper divisors (86585453898).

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

66550194102 is a wasteful number, since it uses less digits than its factorization.

66550194102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10634580.

The product of its (nonzero) digits is 64800, while the sum is 39.

Adding to 66550194102 its reverse (20149105566), we get a palindrome (86699299668).

The spelling of 66550194102 in words is "sixty-six billion, five hundred fifty million, one hundred ninety-four thousand, one hundred two".