133234256166661 has 64 divisors (see below), whose sum is σ = 147525729624000. Its totient is φ = 119568936075264.

The previous prime is 133234256166637. The next prime is 133234256166703. The reversal of 133234256166661 is 166661652432331.

It can be written as a sum of positive squares in 32 ways, for example, as 123573659744161 + 9660596422500 = 11116369^2 + 3108150^2 .

It is not a de Polignac number, because 133234256166661 - 2⁹ = 133234256166149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133234256166761) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43697688265 + ... + 43697691313.

It is an arithmetic number, because the mean of its divisors is an integer number (2305089525375).

Almost surely, 2^{133234256166661} is an apocalyptic number.

It is an amenable number.

133234256166661 is a deficient number, since it is larger than the sum of its proper divisors (14291473457339).

133234256166661 is a wasteful number, since it uses less digits than its factorization.

133234256166661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570.

The product of its digits is 16796160, while the sum is 55.

The spelling of 133234256166661 in words is "one hundred thirty-three trillion, two hundred thirty-four billion, two hundred fifty-six million, one hundred sixty-six thousand, six hundred sixty-one".