131534666 has 8 divisors (see below), whose sum is σ = 200536644. Its totient is φ = 64689120.

The previous prime is 131534653. The next prime is 131534681. The reversal of 131534666 is 666435131.

It can be written as a sum of positive squares in 2 ways, for example, as 129299641 + 2235025 = 11371^2 + 1495^2 .

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

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, 538955 + ... + 539198.

Almost surely, 2^131534666 is an apocalyptic number.

131534666 is a deficient number, since it is larger than the sum of its proper divisors (69001978).

131534666 is a wasteful number, since it uses less digits than its factorization.

131534666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078216.

The product of its digits is 38880, while the sum is 35.

The square root of 131534666 is about 11468.8563510055. The cubic root of 131534666 is about 508.5653207059.

Adding to 131534666 its reverse (666435131), we get a palindrome (797969797).

The spelling of 131534666 in words is "one hundred thirty-one million, five hundred thirty-four thousand, six hundred sixty-six".