266142065255531 has 2 divisors, whose sum is σ = 266142065255532. Its totient is φ = 266142065255530.

The previous prime is 266142065255527. The next prime is 266142065255543. The reversal of 266142065255531 is 135552560241662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266142065255531 - 2² = 266142065255527 is a prime.

It is a super-2 number, since 2×266142065255531² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266142065255831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133071032627765 + 133071032627766.

It is an arithmetic number, because the mean of its divisors is an integer number (133071032627766).

Almost surely, 2^{266142065255531} is an apocalyptic number.

266142065255531 is a deficient number, since it is larger than the sum of its proper divisors (1).

266142065255531 is an equidigital number, since it uses as much as digits as its factorization.

266142065255531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 266142065255531 in words is "two hundred sixty-six trillion, one hundred forty-two billion, sixty-five million, two hundred fifty-five thousand, five hundred thirty-one".