131700661657777 has 4 divisors (see below), whose sum is σ = 131700684615156. Its totient is φ = 131700638700400.

The previous prime is 131700661657757. The next prime is 131700661657781. The reversal of 131700661657777 is 777756166007131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 29385029273616 + 102315632384161 = 5420796^2 + 10115119^2 .

It is a cyclic number.

It is not a de Polignac number, because 131700661657777 - 2¹⁵ = 131700661625009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131700661657757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5373027 + ... + 17095927.

It is an arithmetic number, because the mean of its divisors is an integer number (32925171153789).

Almost surely, 2^{131700661657777} is an apocalyptic number.

It is an amenable number.

131700661657777 is a deficient number, since it is larger than the sum of its proper divisors (22957379).

131700661657777 is a wasteful number, since it uses less digits than its factorization.

131700661657777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22957378.

The product of its (nonzero) digits is 54454680, while the sum is 64.

The spelling of 131700661657777 in words is "one hundred thirty-one trillion, seven hundred billion, six hundred sixty-one million, six hundred fifty-seven thousand, seven hundred seventy-seven".