266228813820 has 96 divisors (see below), whose sum is σ = 789428505600. Its totient is φ = 66806498304.

The previous prime is 266228813819. The next prime is 266228813821. The reversal of 266228813820 is 28318822662.

It is an interprime number because it is at equal distance from previous prime (266228813819) and next prime (266228813821).

It is a self number, because there is not a number n which added to its sum of digits gives 266228813820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266228813821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6793041 + ... + 6832119.

It is an arithmetic number, because the mean of its divisors is an integer number (8223213600).

Almost surely, 2^266228813820 is an apocalyptic number.

266228813820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266228813820 is an abundant number, since it is smaller than the sum of its proper divisors (523199691780).

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

266228813820 is a wasteful number, since it uses less digits than its factorization.

266228813820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45787 (or 45785 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 266228813820 in words is "two hundred sixty-six billion, two hundred twenty-eight million, eight hundred thirteen thousand, eight hundred twenty".