127666157567722 has 16 divisors (see below), whose sum is σ = 192452367358152. Its totient is φ = 63515805166080.

The previous prime is 127666157567713. The next prime is 127666157567723. The reversal of 127666157567722 is 227765751666721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 119207942861121 + 8458214706601 = 10918239^2 + 2908301^2 .

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 7 ways as a sum of consecutive naturals, for example, 108594043 + ... + 109763374.

Almost surely, 2^{127666157567722} is an apocalyptic number.

127666157567722 is a deficient number, since it is larger than the sum of its proper divisors (64786209790430).

127666157567722 is a wasteful number, since it uses less digits than its factorization.

127666157567722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218358873.

The product of its digits is 622339200, while the sum is 70.

The spelling of 127666157567722 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-two".