127131666660 has 72 divisors (see below), whose sum is σ = 387005234616. Its totient is φ = 33781117440.

The previous prime is 127131666659. The next prime is 127131666671. The reversal of 127131666660 is 66666131721.

It can be written as a sum of positive squares in 4 ways, for example, as 30713964516 + 96417702144 = 175254^2 + 310512^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1206159 + ... + 1307318.

It is an arithmetic number, because the mean of its divisors is an integer number (5375072703).

Almost surely, 2^127131666660 is an apocalyptic number.

127131666660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127131666660 is an abundant number, since it is smaller than the sum of its proper divisors (259873567956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127131666660 is a wasteful number, since it uses less digits than its factorization.

127131666660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513773 (or 2513768 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 127131666660 in words is "one hundred twenty-seven billion, one hundred thirty-one million, six hundred sixty-six thousand, six hundred sixty".