66602831021226 has 12 divisors (see below), whose sum is σ = 144306133879362. Its totient is φ = 22200943673736.

The previous prime is 66602831021201. The next prime is 66602831021227. The reversal of 66602831021226 is 62212013820666.

It can be written as a sum of positive squares in only one way, i.e., 65460251744001 + 1142579277225 = 8090751^2 + 1068915^2 .

It is not an unprimeable number, because it can be changed into a prime (66602831021227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1850078639461 + ... + 1850078639496.

Almost surely, 2^{66602831021226} is an apocalyptic number.

66602831021226 is an abundant number, since it is smaller than the sum of its proper divisors (77703302858136).

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

66602831021226 is a wasteful number, since it uses less digits than its factorization.

66602831021226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700157278965 (or 3700157278962 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 66602831021226 in words is "sixty-six trillion, six hundred two billion, eight hundred thirty-one million, twenty-one thousand, two hundred twenty-six".