266883454018624 has 63 divisors (see below), whose sum is σ = 536406220933317. Its totient is φ = 131747494215168.

The previous prime is 266883454018567. The next prime is 266883454018631. The reversal of 266883454018624 is 426810454388662.

It is a happy number.

The square root of 266883454018624 is 16336568.

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

It can be written as a sum of positive squares in only one way, i.e., 3478344361024 + 263405109657600 = 1865032^2 + 16229760^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266883454018624.

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, 10324698052 + ... + 10324723900.

It is an arithmetic number, because the mean of its divisors is an integer number (8514384459259).

Almost surely, 2^{266883454018624} is an apocalyptic number.

266883454018624 is the 16336568-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266883454018624

266883454018624 is an abundant number, since it is smaller than the sum of its proper divisors (269522766914693).

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

266883454018624 is an frugal number, since it uses more digits than its factorization.

266883454018624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51868 (or 25930 counting only the distinct ones).

The product of its (nonzero) digits is 424673280, while the sum is 67.

The spelling of 266883454018624 in words is "two hundred sixty-six trillion, eight hundred eighty-three billion, four hundred fifty-four million, eighteen thousand, six hundred twenty-four".