266020405857424 has 45 divisors (see below), whose sum is σ = 543971893042227. Its totient is φ = 126009078767712.

The previous prime is 266020405857391. The next prime is 266020405857433. The reversal of 266020405857424 is 424758504020662.

The square root of 266020405857424 is 16310132.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1239462729 + ... + 1239677335.

Almost surely, 2^{266020405857424} is an apocalyptic number.

266020405857424 is the 16310132-nd square number.

It is an amenable number.

266020405857424 is an abundant number, since it is smaller than the sum of its proper divisors (277951487184803).

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

266020405857424 is an frugal number, since it uses more digits than its factorization.

266020405857424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429260 (or 214628 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 55.

The spelling of 266020405857424 in words is "two hundred sixty-six trillion, twenty billion, four hundred five million, eight hundred fifty-seven thousand, four hundred twenty-four".