66550442206 has 16 divisors (see below), whose sum is σ = 100065929040. Its totient is φ = 33195167680.

The previous prime is 66550442183. The next prime is 66550442243. The reversal of 66550442206 is 60224405566.

It is a super-2 number, since 2×66550442206² (a number of 22 digits) contains 22 as substring.

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, 6936945 + ... + 6946531.

It is an arithmetic number, because the mean of its divisors is an integer number (6254120565).

Almost surely, 2^66550442206 is an apocalyptic number.

66550442206 is a deficient number, since it is larger than the sum of its proper divisors (33515486834).

66550442206 is a wasteful number, since it uses less digits than its factorization.

66550442206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17579.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 66550442206 in words is "sixty-six billion, five hundred fifty million, four hundred forty-two thousand, two hundred six".