266165997 has 8 divisors (see below), whose sum is σ = 360706080. Its totient is φ = 174534960.

The previous prime is 266165993. The next prime is 266166011. The reversal of 266165997 is 799561662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 266165997 - 2² = 266165993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266165993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727047 + ... + 727412.

It is an arithmetic number, because the mean of its divisors is an integer number (45088260).

Almost surely, 2^266165997 is an apocalyptic number.

It is an amenable number.

266165997 is a deficient number, since it is larger than the sum of its proper divisors (94540083).

266165997 is a wasteful number, since it uses less digits than its factorization.

266165997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454523.

The product of its digits is 1224720, while the sum is 51.

The square root of 266165997 is about 16314.5946011539. The cubic root of 266165997 is about 643.2565113300.

The spelling of 266165997 in words is "two hundred sixty-six million, one hundred sixty-five thousand, nine hundred ninety-seven".