266370027261 has 32 divisors (see below), whose sum is σ = 426293562240. Its totient is φ = 146157778944.

The previous prime is 266370027241. The next prime is 266370027281. The reversal of 266370027261 is 162720073662.

It is an interprime number because it is at equal distance from previous prime (266370027241) and next prime (266370027281).

It is not a de Polignac number, because 266370027261 - 2⁶ = 266370027197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266370027241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10560160 + ... + 10585353.

It is an arithmetic number, because the mean of its divisors is an integer number (13321673820).

Almost surely, 2^266370027261 is an apocalyptic number.

It is an amenable number.

266370027261 is a deficient number, since it is larger than the sum of its proper divisors (159923534979).

266370027261 is a wasteful number, since it uses less digits than its factorization.

266370027261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21145565.

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 266370027261 in words is "two hundred sixty-six billion, three hundred seventy million, twenty-seven thousand, two hundred sixty-one".