266164039856 has 80 divisors (see below), whose sum is σ = 619938654720. Its totient is φ = 109080034560.

The previous prime is 266164039847. The next prime is 266164039861. The reversal of 266164039856 is 658930461662.

It is a super-2 number, since 2×266164039856² (a number of 24 digits) contains 22 as substring.

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, 1254296 + ... + 1451063.

It is an arithmetic number, because the mean of its divisors is an integer number (7749233184).

Almost surely, 2^266164039856 is an apocalyptic number.

266164039856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

266164039856 is an abundant number, since it is smaller than the sum of its proper divisors (353774614864).

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

266164039856 is a wasteful number, since it uses less digits than its factorization.

266164039856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705434 (or 2705428 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 266164039856 in words is "two hundred sixty-six billion, one hundred sixty-four million, thirty-nine thousand, eight hundred fifty-six".