266002006662261 has 36 divisors (see below), whose sum is σ = 397962341650380. Its totient is φ = 171206560828800.

The previous prime is 266002006662241. The next prime is 266002006662277. The reversal of 266002006662261 is 162266600200662.

It can be written as a sum of positive squares in 2 ways, for example, as 140920284870225 + 125081721792036 = 11870985^2 + 11183994^2 .

It is not a de Polignac number, because 266002006662261 - 2¹⁵ = 266002006629493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266002006662241) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32885176 + ... + 40167633.

Almost surely, 2^{266002006662261} is an apocalyptic number.

It is an amenable number.

266002006662261 is a deficient number, since it is larger than the sum of its proper divisors (131960334988119).

266002006662261 is a wasteful number, since it uses less digits than its factorization.

266002006662261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73053298 (or 73053264 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 266002006662261 in words is "two hundred sixty-six trillion, two billion, six million, six hundred sixty-two thousand, two hundred sixty-one".