266283997 has 4 divisors (see below), whose sum is σ = 304324576. Its totient is φ = 228243420.

The previous prime is 266283989. The next prime is 266284013. The reversal of 266283997 is 799382662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266283997 - 2³ = 266283989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266283977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19020279 + ... + 19020292.

It is an arithmetic number, because the mean of its divisors is an integer number (76081144).

Almost surely, 2^266283997 is an apocalyptic number.

It is an amenable number.

266283997 is a deficient number, since it is larger than the sum of its proper divisors (38040579).

266283997 is an equidigital number, since it uses as much as digits as its factorization.

266283997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38040578.

The product of its digits is 1959552, while the sum is 52.

The square root of 266283997 is about 16318.2105943023. The cubic root of 266283997 is about 643.3515560953.

It can be divided in two parts, 26628 and 3997, that added together give a square (30625 = 175²).

The spelling of 266283997 in words is "two hundred sixty-six million, two hundred eighty-three thousand, nine hundred ninety-seven".