127662757666 has 8 divisors (see below), whose sum is σ = 191495670444. Its totient is φ = 63830867520.

The previous prime is 127662757657. The next prime is 127662757679. The reversal of 127662757666 is 666757266721.

It can be written as a sum of positive squares in 2 ways, for example, as 127178537641 + 484220025 = 356621^2 + 22005^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285726 + ... + 580486.

Almost surely, 2^127662757666 is an apocalyptic number.

127662757666 is a deficient number, since it is larger than the sum of its proper divisors (63832912778).

127662757666 is a wasteful number, since it uses less digits than its factorization.

127662757666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511316.

The product of its digits is 53343360, while the sum is 61.

The spelling of 127662757666 in words is "one hundred twenty-seven billion, six hundred sixty-two million, seven hundred fifty-seven thousand, six hundred sixty-six".