266400040406 has 16 divisors (see below), whose sum is σ = 405104825664. Its totient is φ = 131365376064.

The previous prime is 266400040369. The next prime is 266400040433. The reversal of 266400040406 is 604040004662.

266400040406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2086691 + ... + 2210673.

It is an arithmetic number, because the mean of its divisors is an integer number (25319051604).

Almost surely, 2^266400040406 is an apocalyptic number.

266400040406 is a deficient number, since it is larger than the sum of its proper divisors (138704785258).

266400040406 is a wasteful number, since it uses less digits than its factorization.

266400040406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138775.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 266400040406 in words is "two hundred sixty-six billion, four hundred million, forty thousand, four hundred six".