266897809332 has 144 divisors (see below), whose sum is σ = 858298896000. Its totient is φ = 69324071040.

The previous prime is 266897809327. The next prime is 266897809361. The reversal of 266897809332 is 233908798662.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 266897809332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 846657 + ... + 1118312.

It is an arithmetic number, because the mean of its divisors is an integer number (5960409000).

Almost surely, 2^266897809332 is an apocalyptic number.

266897809332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

266897809332 is an abundant number, since it is smaller than the sum of its proper divisors (591401086668).

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

266897809332 is a wasteful number, since it uses less digits than its factorization.

266897809332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965011 (or 1964992 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 266897809332 in words is "two hundred sixty-six billion, eight hundred ninety-seven million, eight hundred nine thousand, three hundred thirty-two".