131666053 has 4 divisors (see below), whose sum is σ = 137390688. Its totient is φ = 125941420.

The previous prime is 131666023. The next prime is 131666057. The reversal of 131666053 is 350666131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 350666131 = 37 ⋅9477463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131666053 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131666057) 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, 2862283 + ... + 2862328.

It is an arithmetic number, because the mean of its divisors is an integer number (34347672).

Almost surely, 2^131666053 is an apocalyptic number.

It is an amenable number.

131666053 is a deficient number, since it is larger than the sum of its proper divisors (5724635).

131666053 is an equidigital number, since it uses as much as digits as its factorization.

131666053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724634.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 131666053 is about 11474.5829118099. The cubic root of 131666053 is about 508.7345958185.

The spelling of 131666053 in words is "one hundred thirty-one million, six hundred sixty-six thousand, fifty-three".