266608090400 has 72 divisors (see below), whose sum is σ = 650963687220. Its totient is φ = 106625756160.

The previous prime is 266608090393. The next prime is 266608090429. The reversal of 266608090400 is 4090806662.

It can be written as a sum of positive squares in 6 ways, for example, as 56451859216 + 210156231184 = 237596^2 + 458428^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5573786 + ... + 5621414.

Almost surely, 2^266608090400 is an apocalyptic number.

266608090400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266608090400 is an abundant number, since it is smaller than the sum of its proper divisors (384355596820).

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

266608090400 is a wasteful number, since it uses less digits than its factorization.

266608090400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54646 (or 54633 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 266608090400 in words is "two hundred sixty-six billion, six hundred eight million, ninety thousand, four hundred".