266736511340 has 48 divisors (see below), whose sum is σ = 638719294752. Its totient is φ = 92693953536.

The previous prime is 266736511339. The next prime is 266736511361. The reversal of 266736511340 is 43115637662.

It is a super-2 number, since 2×266736511340² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266736511291 and 266736511300.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30169394 + ... + 30178233.

It is an arithmetic number, because the mean of its divisors is an integer number (13306651974).

Almost surely, 2^266736511340 is an apocalyptic number.

266736511340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266736511340 is an abundant number, since it is smaller than the sum of its proper divisors (371982783412).

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

266736511340 is a wasteful number, since it uses less digits than its factorization.

266736511340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60347666 (or 60347664 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 266736511340 in words is "two hundred sixty-six billion, seven hundred thirty-six million, five hundred eleven thousand, three hundred forty".