266273893045801 has 9 divisors (see below), whose sum is σ = 266464900388701. Its totient is φ = 266083022557804.

The previous prime is 266273893045793. The next prime is 266273893045807. The reversal of 266273893045801 is 108540398372662.

The square root of 266273893045801 is 16317901.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 266273893045801 - 2³ = 266273893045793 is a prime.

It is a super-2 number, since 2×266273893045801² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266273893045807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26418676680 + ... + 26418686758.

It is a 2-persistent number, because it is pandigital, and so is 2⋅266273893045801 = 532547786091602, but 3⋅266273893045801 = 798821679137403 is not.

Almost surely, 2^{266273893045801} is an apocalyptic number.

266273893045801 is the 16317901-st square number.

266273893045801 is the 8158951-st centered octagonal number.

It is an amenable number.

266273893045801 is a deficient number, since it is larger than the sum of its proper divisors (191007342900).

266273893045801 is an frugal number, since it uses more digits than its factorization.

266273893045801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23396 (or 11698 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 64.

The spelling of 266273893045801 in words is "two hundred sixty-six trillion, two hundred seventy-three billion, eight hundred ninety-three million, forty-five thousand, eight hundred one".