266747920 has 40 divisors (see below), whose sum is σ = 634620096. Its totient is φ = 104216448.

The previous prime is 266747903. The next prime is 266747941. The reversal of 266747920 is 29747662.

266747920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35332 + ... + 42211.

Almost surely, 2^266747920 is an apocalyptic number.

266747920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266747920 is an abundant number, since it is smaller than the sum of its proper divisors (367872176).

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

266747920 is a wasteful number, since it uses less digits than its factorization.

266747920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77599 (or 77593 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 266747920 is about 16332.4192941524. The cubic root of 266747920 is about 643.7249574574.

The spelling of 266747920 in words is "two hundred sixty-six million, seven hundred forty-seven thousand, nine hundred twenty".