266649429280 has 96 divisors (see below), whose sum is σ = 678883606128. Its totient is φ = 98387558400.

The previous prime is 266649429269. The next prime is 266649429301. The reversal of 266649429280 is 82924946662.

It can be written as a sum of positive squares in 8 ways, for example, as 33163323664 + 233486105616 = 182108^2 + 483204^2 .

It is a super-2 number, since 2×266649429280² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3037200 + ... + 3123760.

Almost surely, 2^266649429280 is an apocalyptic number.

266649429280 is a gapful number since it is divisible by the number (20) 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 266649429280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339441803064).

266649429280 is an abundant number, since it is smaller than the sum of its proper divisors (412234176848).

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

266649429280 is a wasteful number, since it uses less digits than its factorization.

266649429280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88070 (or 88062 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 58.

The spelling of 266649429280 in words is "two hundred sixty-six billion, six hundred forty-nine million, four hundred twenty-nine thousand, two hundred eighty".