266957380 has 24 divisors (see below), whose sum is σ = 561460032. Its totient is φ = 106621152.

The previous prime is 266957351. The next prime is 266957401. The reversal of 266957380 is 83759662.

266957380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 266957380.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3889 + ... + 23431.

It is an arithmetic number, because the mean of its divisors is an integer number (23394168).

Almost surely, 2^266957380 is an apocalyptic number.

266957380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266957380 is an abundant number, since it is smaller than the sum of its proper divisors (294502652).

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

266957380 is a wasteful number, since it uses less digits than its factorization.

266957380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20235 (or 20233 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 266957380 is about 16338.8304354994. The cubic root of 266957380 is about 643.8934053221.

The spelling of 266957380 in words is "two hundred sixty-six million, nine hundred fifty-seven thousand, three hundred eighty".