266420999 has 16 divisors (see below), whose sum is σ = 298233600. Its totient is φ = 236307456.

The previous prime is 266420971. The next prime is 266421041. The reversal of 266420999 is 999024662.

266420999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 266420999 - 2¹² = 266416903 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 (266420909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82487 + ... + 85655.

It is an arithmetic number, because the mean of its divisors is an integer number (18639600).

Almost surely, 2^266420999 is an apocalyptic number.

266420999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

266420999 is a deficient number, since it is larger than the sum of its proper divisors (31812601).

266420999 is a wasteful number, since it uses less digits than its factorization.

266420999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 266420999 is about 16322.4078799667. The cubic root of 266420999 is about 643.4618710714.

The spelling of 266420999 in words is "two hundred sixty-six million, four hundred twenty thousand, nine hundred ninety-nine".