266958025 has 12 divisors (see below), whose sum is σ = 331537932. Its totient is φ = 213237440.

The previous prime is 266957989. The next prime is 266958031. The reversal of 266958025 is 520859662.

It can be written as a sum of positive squares in 6 ways, for example, as 17065161 + 249892864 = 4131^2 + 15808^2 .

It is not a de Polignac number, because 266958025 - 2⁷ = 266957897 is a prime.

It is a super-2 number, since 2×266958025² = 142533174223801250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9039 + ... + 24811.

It is an arithmetic number, because the mean of its divisors is an integer number (27628161).

Almost surely, 2^266958025 is an apocalyptic number.

266958025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266958025 is a deficient number, since it is larger than the sum of its proper divisors (64579907).

266958025 is a wasteful number, since it uses less digits than its factorization.

266958025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16460 (or 16455 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 266958025 is about 16338.8501737423. The cubic root of 266958025 is about 643.8939238954.

The spelling of 266958025 in words is "two hundred sixty-six million, nine hundred fifty-eight thousand, twenty-five".