266660771832 has 288 divisors, whose sum is σ = 916206782400. Its totient is φ = 69436942848.

The previous prime is 266660771827. The next prime is 266660771837. The reversal of 266660771832 is 238177066662.

266660771832 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (266660771827) and next prime (266660771837).

It is a super-2 number, since 2×266660771832² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266660771837) 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, 3586458 + ... + 3660054.

It is an arithmetic number, because the mean of its divisors is an integer number (3181273550).

Almost surely, 2^266660771832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266660771832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458103391200).

266660771832 is an abundant number, since it is smaller than the sum of its proper divisors (649546010568).

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

266660771832 is a wasteful number, since it uses less digits than its factorization.

266660771832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73715 (or 73701 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 266660771832 in words is "two hundred sixty-six billion, six hundred sixty million, seven hundred seventy-one thousand, eight hundred thirty-two".