266160421 has 2 divisors, whose sum is σ = 266160422. Its totient is φ = 266160420.

The previous prime is 266160383. The next prime is 266160473. The reversal of 266160421 is 124061662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237591396 + 28569025 = 15414^2 + 5345^2 .

It is a cyclic number.

It is not a de Polignac number, because 266160421 - 2¹⁷ = 266029349 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266160421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266160121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133080210 + 133080211.

It is an arithmetic number, because the mean of its divisors is an integer number (133080211).

Almost surely, 2^266160421 is an apocalyptic number.

It is an amenable number.

266160421 is a deficient number, since it is larger than the sum of its proper divisors (1).

266160421 is an equidigital number, since it uses as much as digits as its factorization.

266160421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 266160421 is about 16314.4237103246. The cubic root of 266160421 is about 643.2520193671.

The spelling of 266160421 in words is "two hundred sixty-six million, one hundred sixty thousand, four hundred twenty-one".