266100640245 has 72 divisors (see below), whose sum is σ = 533667607200. Its totient is φ = 122227997760.

The previous prime is 266100640243. The next prime is 266100640291. The reversal of 266100640245 is 542046001662.

266100640245 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 0 + 0 + 640 + 2 + 4 + 5 = 666.

It is not a de Polignac number, because 266100640245 - 2¹ = 266100640243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266100640243) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1182615 + ... + 1389524.

It is an arithmetic number, because the mean of its divisors is an integer number (7412050100).

Almost surely, 2^266100640245 is an apocalyptic number.

It is an amenable number.

266100640245 is an abundant number, since it is smaller than the sum of its proper divisors (267566966955).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266100640245 is a wasteful number, since it uses less digits than its factorization.

266100640245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572191 (or 2572177 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 266100640245 in words is "two hundred sixty-six billion, one hundred million, six hundred forty thousand, two hundred forty-five".