127906666690 has 48 divisors (see below), whose sum is σ = 267951140856. Its totient is φ = 43775536640.

The previous prime is 127906666631. The next prime is 127906666721. The reversal of 127906666690 is 96666609721.

It can be written as a sum of positive squares in 4 ways, for example, as 77408037729 + 50498628961 = 278223^2 + 224719^2 .

It is a super-2 number, since 2×127906666690² (a number of 23 digits) contains 22 as substring.

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, 3088489 + ... + 3129628.

Almost surely, 2^127906666690 is an apocalyptic number.

127906666690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127906666690 is an abundant number, since it is smaller than the sum of its proper divisors (140044474166).

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

127906666690 is a wasteful number, since it uses less digits than its factorization.

127906666690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218163 (or 6218152 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 127906666690 in words is "one hundred twenty-seven billion, nine hundred six million, six hundred sixty-six thousand, six hundred ninety".