266378280906 has 128 divisors (see below), whose sum is σ = 564941684736. Its totient is φ = 83641844160.

The previous prime is 266378280827. The next prime is 266378280923. The reversal of 266378280906 is 609082873662.

It is a happy number.

266378280906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 338472645 + ... + 338473431.

It is an arithmetic number, because the mean of its divisors is an integer number (4413606912).

Almost surely, 2^266378280906 is an apocalyptic number.

266378280906 is an abundant number, since it is smaller than the sum of its proper divisors (298563403830).

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

266378280906 is a wasteful number, since it uses less digits than its factorization.

266378280906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 266378280906 in words is "two hundred sixty-six billion, three hundred seventy-eight million, two hundred eighty thousand, nine hundred six".