133661343266420 has 12 divisors (see below), whose sum is σ = 280688820859524. Its totient is φ = 53464537306560.

The previous prime is 133661343266393. The next prime is 133661343266513. The reversal of 133661343266420 is 24662343166331.

It can be written as a sum of positive squares in 2 ways, for example, as 70577909936356 + 63083433330064 = 8401066^2 + 7942508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3341533581641 + ... + 3341533581680.

It is an arithmetic number, because the mean of its divisors is an integer number (23390735071627).

Almost surely, 2^{133661343266420} is an apocalyptic number.

133661343266420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133661343266420 is an abundant number, since it is smaller than the sum of its proper divisors (147027477593104).

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

133661343266420 is a wasteful number, since it uses less digits than its factorization.

133661343266420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683067163330 (or 6683067163328 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 50.

The spelling of 133661343266420 in words is "one hundred thirty-three trillion, six hundred sixty-one billion, three hundred forty-three million, two hundred sixty-six thousand, four hundred twenty".