266925985 has 4 divisors (see below), whose sum is σ = 320311188. Its totient is φ = 213540784.

The previous prime is 266925979. The next prime is 266926007. The reversal of 266925985 is 589529662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65399569 + 201526416 = 8087^2 + 14196^2 .

It is a cyclic number.

It is not a de Polignac number, because 266925985 - 2¹³ = 266917793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26692594 + ... + 26692603.

It is an arithmetic number, because the mean of its divisors is an integer number (80077797).

Almost surely, 2^266925985 is an apocalyptic number.

It is an amenable number.

266925985 is a deficient number, since it is larger than the sum of its proper divisors (53385203).

266925985 is an equidigital number, since it uses as much as digits as its factorization.

266925985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53385202.

The product of its digits is 2332800, while the sum is 52.

The square root of 266925985 is about 16337.8696591692. The cubic root of 266925985 is about 643.8681630581.

The spelling of 266925985 in words is "two hundred sixty-six million, nine hundred twenty-five thousand, nine hundred eighty-five".