133406680378 has 4 divisors (see below), whose sum is σ = 200110020570. Its totient is φ = 66703340188.

The previous prime is 133406680369. The next prime is 133406680397. The reversal of 133406680378 is 873086604331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873086604331 = 1297 ⋅673158523.

It can be written as a sum of positive squares in only one way, i.e., 117733393129 + 15673287249 = 343123^2 + 125193^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351670093 + ... + 33351670096.

Almost surely, 2^133406680378 is an apocalyptic number.

133406680378 is a deficient number, since it is larger than the sum of its proper divisors (66703340192).

133406680378 is an equidigital number, since it uses as much as digits as its factorization.

133406680378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66703340191.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 133406680378 in words is "one hundred thirty-three billion, four hundred six million, six hundred eighty thousand, three hundred seventy-eight".