666127102 has 4 divisors (see below), whose sum is σ = 999190656. Its totient is φ = 333063550.

The previous prime is 666127093. The next prime is 666127151. The reversal of 666127102 is 201721666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201721666 = 2 ⋅100860833.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166531774 + ... + 166531777.

It is an arithmetic number, because the mean of its divisors is an integer number (249797664).

Almost surely, 2^666127102 is an apocalyptic number.

666127102 is a deficient number, since it is larger than the sum of its proper divisors (333063554).

666127102 is a wasteful number, since it uses less digits than its factorization.

666127102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333063553.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 666127102 is about 25809.4382348783. The cubic root of 666127102 is about 873.3447245502.

Adding to 666127102 its reverse (201721666), we get a palindrome (867848768).

The spelling of 666127102 in words is "six hundred sixty-six million, one hundred twenty-seven thousand, one hundred two".