266421855239232 has 1344 divisors, whose sum is σ = 960675574809600. Its totient is φ = 64235078369280.

The previous prime is 266421855239227. The next prime is 266421855239261. The reversal of 266421855239232 is 232932558124662.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a super-2 number, since 2×266421855239232² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 113904169519 + ... + 113904171857.

Almost surely, 2^{266421855239232} is an apocalyptic number.

266421855239232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266421855239232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480337787404800).

266421855239232 is an abundant number, since it is smaller than the sum of its proper divisors (694253719570368).

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

266421855239232 is a wasteful number, since it uses less digits than its factorization.

266421855239232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544 (or 3527 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 60.

The spelling of 266421855239232 in words is "two hundred sixty-six trillion, four hundred twenty-one billion, eight hundred fifty-five million, two hundred thirty-nine thousand, two hundred thirty-two".