266781961086 has 64 divisors (see below), whose sum is σ = 556120166400. Its totient is φ = 85256238816.

The previous prime is 266781961073. The next prime is 266781961087. The reversal of 266781961086 is 680169187662.

It is a super-2 number, since 2×266781961086² (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 (266781961087) 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, 4680225 + ... + 4736883.

It is an arithmetic number, because the mean of its divisors is an integer number (8689377600).

Almost surely, 2^266781961086 is an apocalyptic number.

266781961086 is an abundant number, since it is smaller than the sum of its proper divisors (289338205314).

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

266781961086 is a wasteful number, since it uses less digits than its factorization.

266781961086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57053.

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 266781961086 in words is "two hundred sixty-six billion, seven hundred eighty-one million, nine hundred sixty-one thousand, eighty-six".