133445187166 has 4 divisors (see below), whose sum is σ = 200167780752. Its totient is φ = 66722593582.

The previous prime is 133445187151. The next prime is 133445187223. The reversal of 133445187166 is 661781544331.

It is a happy number.

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

It is a super-2 number, since 2×133445187166² (a number of 23 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 as a sum of consecutive naturals, namely, 33361296790 + ... + 33361296793.

It is an arithmetic number, because the mean of its divisors is an integer number (50041945188).

Almost surely, 2^133445187166 is an apocalyptic number.

133445187166 is a deficient number, since it is larger than the sum of its proper divisors (66722593586).

133445187166 is an equidigital number, since it uses as much as digits as its factorization.

133445187166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66722593585.

The product of its digits is 1451520, while the sum is 49.

The spelling of 133445187166 in words is "one hundred thirty-three billion, four hundred forty-five million, one hundred eighty-seven thousand, one hundred sixty-six".