266010156026661 has 24 divisors (see below), whose sum is σ = 374331986107200. Its totient is φ = 168005559311424.

The previous prime is 266010156026633. The next prime is 266010156026723. The reversal of 266010156026661 is 166620651010662.

It is not a de Polignac number, because 266010156026661 - 2¹⁸ = 266010155764517 is a prime.

It is a super-3 number, since 3×266010156026661³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 266010156026661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266010156026261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263964601 + ... + 264970433.

It is an arithmetic number, because the mean of its divisors is an integer number (15597166087800).

Almost surely, 2^{266010156026661} is an apocalyptic number.

It is an amenable number.

266010156026661 is a deficient number, since it is larger than the sum of its proper divisors (108321830080539).

266010156026661 is a wasteful number, since it uses less digits than its factorization.

266010156026661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250073 (or 1250054 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 266010156026661 in words is "two hundred sixty-six trillion, ten billion, one hundred fifty-six million, twenty-six thousand, six hundred sixty-one".