266777420 has 48 divisors (see below), whose sum is σ = 689521728. Its totient is φ = 84430080.

The previous prime is 266777393. The next prime is 266777453. The reversal of 266777420 is 24777662.

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, 71471 + ... + 75110.

It is an arithmetic number, because the mean of its divisors is an integer number (14365036).

Almost surely, 2^266777420 is an apocalyptic number.

266777420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266777420 is an abundant number, since it is smaller than the sum of its proper divisors (422744308).

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

266777420 is a wasteful number, since it uses less digits than its factorization.

266777420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146610 (or 146608 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 266777420 is about 16333.3223809487. The cubic root of 266777420 is about 643.7486867099.

The spelling of 266777420 in words is "two hundred sixty-six million, seven hundred seventy-seven thousand, four hundred twenty".