131663661 has 8 divisors (see below), whose sum is σ = 183184320. Its totient is φ = 83959392.

The previous prime is 131663641. The next prime is 131663671. The reversal of 131663661 is 166366131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131663661 - 2¹⁹ = 131139373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131663641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954016 + ... + 954153.

It is an arithmetic number, because the mean of its divisors is an integer number (22898040).

Almost surely, 2^131663661 is an apocalyptic number.

It is an amenable number.

131663661 is a deficient number, since it is larger than the sum of its proper divisors (51520659).

131663661 is a wasteful number, since it uses less digits than its factorization.

131663661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908195.

The product of its digits is 11664, while the sum is 33.

The square root of 131663661 is about 11474.4786809685. The cubic root of 131663661 is about 508.7315150433.

The spelling of 131663661 in words is "one hundred thirty-one million, six hundred sixty-three thousand, six hundred sixty-one".