127666157567720 has 64 divisors (see below), whose sum is σ = 291297676118400. Its totient is φ = 50346687650560.

The previous prime is 127666157567713. The next prime is 127666157567723. The reversal of 127666157567720 is 27765751666721.

It is not an unprimeable number, because it can be changed into a prime (127666157567723) 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, 374451167 + ... + 374791953.

It is an arithmetic number, because the mean of its divisors is an integer number (4551526189350).

Almost surely, 2^{127666157567720} is an apocalyptic number.

127666157567720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127666157567720 is an abundant number, since it is smaller than the sum of its proper divisors (163631518550680).

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

127666157567720 is a wasteful number, since it uses less digits than its factorization.

127666157567720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472778 (or 472774 counting only the distinct ones).

The product of its (nonzero) digits is 311169600, while the sum is 68.

The spelling of 127666157567720 in words is "one hundred twenty-seven trillion, six hundred sixty-six billion, one hundred fifty-seven million, five hundred sixty-seven thousand, seven hundred twenty".