266680695840 has 96 divisors (see below), whose sum is σ = 904662997056. Its totient is φ = 65644477440.

The previous prime is 266680695797. The next prime is 266680695847. The reversal of 266680695840 is 48596086662.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×266680695840² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (266680695847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21362406 + ... + 21374885.

It is an arithmetic number, because the mean of its divisors is an integer number (9423572886).

Almost surely, 2^266680695840 is an apocalyptic number.

266680695840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266680695840 is an abundant number, since it is smaller than the sum of its proper divisors (637982301216).

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

266680695840 is a wasteful number, since it uses less digits than its factorization.

266680695840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42737322 (or 42737314 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 266680695840 in words is "two hundred sixty-six billion, six hundred eighty million, six hundred ninety-five thousand, eight hundred forty".