127666398 has 32 divisors (see below), whose sum is σ = 262094976. Its totient is φ = 41434848.

The previous prime is 127666393. The next prime is 127666417. The reversal of 127666398 is 893666721.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127666393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113736 + ... + 114852.

It is an arithmetic number, because the mean of its divisors is an integer number (8190468).

Almost surely, 2^127666398 is an apocalyptic number.

127666398 is an abundant number, since it is smaller than the sum of its proper divisors (134428578).

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

127666398 is a wasteful number, since it uses less digits than its factorization.

127666398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608.

The product of its digits is 653184, while the sum is 48.

The square root of 127666398 is about 11298.9556154540. The cubic root of 127666398 is about 503.5302138537.

The spelling of 127666398 in words is "one hundred twenty-seven million, six hundred sixty-six thousand, three hundred ninety-eight".