266120080 has 40 divisors (see below), whose sum is σ = 651297600. Its totient is φ = 100844928.

The previous prime is 266120059. The next prime is 266120083. The reversal of 266120080 is 80021662.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (266120083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86020 + ... + 89059.

It is an arithmetic number, because the mean of its divisors is an integer number (16282440).

Almost surely, 2^266120080 is an apocalyptic number.

266120080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266120080 is an abundant number, since it is smaller than the sum of its proper divisors (385177520).

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

266120080 is a wasteful number, since it uses less digits than its factorization.

266120080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175111 (or 175105 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 266120080 is about 16313.1873035284. The cubic root of 266120080 is about 643.2195192421.

The spelling of 266120080 in words is "two hundred sixty-six million, one hundred twenty thousand, eighty".