266231054651563 has 8 divisors (see below), whose sum is σ = 266243641989920. Its totient is φ = 266218467704640.

The previous prime is 266231054651543. The next prime is 266231054651587. The reversal of 266231054651563 is 365156450132662.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266231054651563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266231054651543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3341674693 + ... + 3341754361.

It is an arithmetic number, because the mean of its divisors is an integer number (33280455248740).

Almost surely, 2^{266231054651563} is an apocalyptic number.

266231054651563 is a deficient number, since it is larger than the sum of its proper divisors (12587338357).

266231054651563 is an equidigital number, since it uses as much as digits as its factorization.

266231054651563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195717.

The product of its (nonzero) digits is 23328000, while the sum is 55.

The spelling of 266231054651563 in words is "two hundred sixty-six trillion, two hundred thirty-one billion, fifty-four million, six hundred fifty-one thousand, five hundred sixty-three".