126766957321 has 8 divisors (see below), whose sum is σ = 127578904200. Its totient is φ = 125956712448.

The previous prime is 126766957283. The next prime is 126766957327. The reversal of 126766957321 is 123759667621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 63784028025 + 62982929296 = 252555^2 + 250964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126766957321 - 2²¹ = 126764860169 is a prime.

It is a super-2 number, since 2×126766957321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126766957327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275896 + ... + 574153.

It is an arithmetic number, because the mean of its divisors is an integer number (15947363025).

Almost surely, 2^126766957321 is an apocalyptic number.

It is an amenable number.

126766957321 is a deficient number, since it is larger than the sum of its proper divisors (811946879).

126766957321 is an equidigital number, since it uses as much as digits as its factorization.

126766957321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851003.

The product of its digits is 5715360, while the sum is 55.

The spelling of 126766957321 in words is "one hundred twenty-six billion, seven hundred sixty-six million, nine hundred fifty-seven thousand, three hundred twenty-one".