135127666 has 4 divisors (see below), whose sum is σ = 202691502. Its totient is φ = 67563832.

The previous prime is 135127661. The next prime is 135127709. The reversal of 135127666 is 666721531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666721531 = 7 ⋅95245933.

It can be written as a sum of positive squares in only one way, i.e., 133980625 + 1147041 = 11575^2 + 1071^2 .

It is a super-2 number, since 2×135127666² = 36518972237215112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135127661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33781915 + ... + 33781918.

Almost surely, 2^135127666 is an apocalyptic number.

135127666 is a deficient number, since it is larger than the sum of its proper divisors (67563836).

135127666 is an equidigital number, since it uses as much as digits as its factorization.

135127666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67563835.

The product of its digits is 45360, while the sum is 37.

The square root of 135127666 is about 11624.4426102932. The cubic root of 135127666 is about 513.1544410474.

The spelling of 135127666 in words is "one hundred thirty-five million, one hundred twenty-seven thousand, six hundred sixty-six".