266451231155061 has 4 divisors (see below), whose sum is σ = 355268308206752. Its totient is φ = 177634154103372.

The previous prime is 266451231154981. The next prime is 266451231155099. The reversal of 266451231155061 is 160551132154662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 266451231155061 - 2¹⁰ = 266451231154037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266451231155061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266451231155861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44408538525841 + ... + 44408538525846.

It is an arithmetic number, because the mean of its divisors is an integer number (88817077051688).

Almost surely, 2^{266451231155061} is an apocalyptic number.

It is an amenable number.

266451231155061 is a deficient number, since it is larger than the sum of its proper divisors (88817077051691).

266451231155061 is an equidigital number, since it uses as much as digits as its factorization.

266451231155061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88817077051690.

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 266451231155061 in words is "two hundred sixty-six trillion, four hundred fifty-one billion, two hundred thirty-one million, one hundred fifty-five thousand, sixty-one".