66203186226 has 32 divisors (see below), whose sum is σ = 137341596480. Its totient is φ = 21259252224.

The previous prime is 66203186209. The next prime is 66203186233. The reversal of 66203186226 is 62268130266.

It is a happy number.

It is a super-2 number, since 2×66203186226² (a number of 22 digits) contains 22 as substring.

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, 1738711 + ... + 1776378.

It is an arithmetic number, because the mean of its divisors is an integer number (4291924890).

Almost surely, 2^66203186226 is an apocalyptic number.

66203186226 is an abundant number, since it is smaller than the sum of its proper divisors (71138410254).

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

66203186226 is a wasteful number, since it uses less digits than its factorization.

66203186226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515210.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 66203186226 in words is "sixty-six billion, two hundred three million, one hundred eighty-six thousand, two hundred twenty-six".