266820948 has 36 divisors (see below), whose sum is σ = 690918228. Its totient is φ = 86770560.

The previous prime is 266820947. The next prime is 266820973. The reversal of 266820948 is 849028662.

It can be written as a sum of positive squares in 2 ways, for example, as 30338064 + 236482884 = 5508^2 + 15378^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266820941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88911 + ... + 91862.

It is an arithmetic number, because the mean of its divisors is an integer number (19192173).

Almost surely, 2^266820948 is an apocalyptic number.

It is an amenable number.

266820948 is an abundant number, since it is smaller than the sum of its proper divisors (424097280).

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

266820948 is a wasteful number, since it uses less digits than its factorization.

266820948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180824 (or 180819 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 266820948 is about 16334.6548172895. The cubic root of 266820948 is about 643.7836966306.

The spelling of 266820948 in words is "two hundred sixty-six million, eight hundred twenty thousand, nine hundred forty-eight".