266626420 has 24 divisors (see below), whose sum is σ = 560473704. Its totient is φ = 106544256.

The previous prime is 266626397. The next prime is 266626427. The reversal of 266626420 is 24626662.

It can be written as a sum of positive squares in 4 ways, for example, as 127103076 + 139523344 = 11274^2 + 11812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266626427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15762 + ... + 27958.

It is an arithmetic number, because the mean of its divisors is an integer number (23353071).

Almost surely, 2^266626420 is an apocalyptic number.

266626420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266626420 is an abundant number, since it is smaller than the sum of its proper divisors (293847284).

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

266626420 is a wasteful number, since it uses less digits than its factorization.

266626420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299 (or 13297 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 266626420 is about 16328.6992745901. The cubic root of 266626420 is about 643.6272066667.

The spelling of 266626420 in words is "two hundred sixty-six million, six hundred twenty-six thousand, four hundred twenty".