266650648 has 32 divisors (see below), whose sum is σ = 548467920. Its totient is φ = 120528000.

The previous prime is 266650639. The next prime is 266650669. The reversal of 266650648 is 846056662.

It is a super-2 number, since 2×266650648² = 142205136157639808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7558 + ... + 24298.

Almost surely, 2^266650648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266650648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274233960).

266650648 is an abundant number, since it is smaller than the sum of its proper divisors (281817272).

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

266650648 is a wasteful number, since it uses less digits than its factorization.

266650648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16939 (or 16935 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 266650648 is about 16329.4411416925. The cubic root of 266650648 is about 643.6467012685.

The spelling of 266650648 in words is "two hundred sixty-six million, six hundred fifty thousand, six hundred forty-eight".