66040206460226 has 4 divisors (see below), whose sum is σ = 99060309690342. Its totient is φ = 33020103230112.

The previous prime is 66040206460223. The next prime is 66040206460273. The reversal of 66040206460226 is 62206460204066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 65923860661201 + 116345799025 = 8119351^2 + 341095^2 .

It is a super-2 number, since 2×66040206460226² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66040206460223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16510051615055 + ... + 16510051615058.

Almost surely, 2^{66040206460226} is an apocalyptic number.

66040206460226 is a deficient number, since it is larger than the sum of its proper divisors (33020103230116).

66040206460226 is a wasteful number, since it uses less digits than its factorization.

66040206460226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33020103230115.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 66040206460226 in words is "sixty-six trillion, forty billion, two hundred six million, four hundred sixty thousand, two hundred twenty-six".