266231054651587 has 2 divisors, whose sum is σ = 266231054651588. Its totient is φ = 266231054651586.

The previous prime is 266231054651543. The next prime is 266231054651651. The reversal of 266231054651587 is 785156450132662.

It is a happy number.

266231054651587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266231054651587 - 2⁷ = 266231054651459 is a prime.

It is not a weakly prime, because it can be changed into another prime (266231054651987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133115527325793 + 133115527325794.

It is an arithmetic number, because the mean of its divisors is an integer number (133115527325794).

Almost surely, 2^{266231054651587} is an apocalyptic number.

266231054651587 is a deficient number, since it is larger than the sum of its proper divisors (1).

266231054651587 is an equidigital number, since it uses as much as digits as its factorization.

266231054651587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576000, while the sum is 61.

The spelling of 266231054651587 in words is "two hundred sixty-six trillion, two hundred thirty-one billion, fifty-four million, six hundred fifty-one thousand, five hundred eighty-seven".