126166643 has 2 divisors, whose sum is σ = 126166644. Its totient is φ = 126166642.

The previous prime is 126166583. The next prime is 126166699. The reversal of 126166643 is 346661621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126166643 - 2¹⁴ = 126150259 is a prime.

It is not a weakly prime, because it can be changed into another prime (126166043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63083321 + 63083322.

It is an arithmetic number, because the mean of its divisors is an integer number (63083322).

Almost surely, 2^126166643 is an apocalyptic number.

126166643 is a deficient number, since it is larger than the sum of its proper divisors (1).

126166643 is an equidigital number, since it uses as much as digits as its factorization.

126166643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 126166643 is about 11232.3925768289. The cubic root of 126166643 is about 501.5507096273.

The spelling of 126166643 in words is "one hundred twenty-six million, one hundred sixty-six thousand, six hundred forty-three".