127863666 has 96 divisors (see below), whose sum is σ = 331164288. Its totient is φ = 34894080.

The previous prime is 127863653. The next prime is 127863683. The reversal of 127863666 is 666368721.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (435456) is a multiple of the sum of its prime factors (576).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273565 + ... + 274031.

It is an arithmetic number, because the mean of its divisors is an integer number (3449628).

Almost surely, 2^127863666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 127863666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165582144).

127863666 is an abundant number, since it is smaller than the sum of its proper divisors (203300622).

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

127863666 is a wasteful number, since it uses less digits than its factorization.

127863666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 573 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 127863666 is about 11307.6817252698. The cubic root of 127863666 is about 503.7894292317.

The spelling of 127863666 in words is "one hundred twenty-seven million, eight hundred sixty-three thousand, six hundred sixty-six".