266998939 has 8 divisors (see below), whose sum is σ = 276175872. Its totient is φ = 257857320.

The previous prime is 266998933. The next prime is 266998943. The reversal of 266998939 is 939899662.

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

It is a cyclic number.

It is not a de Polignac number, because 266998939 - 2¹⁹ = 266474651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266998933) 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, 7032 + ... + 24154.

It is an arithmetic number, because the mean of its divisors is an integer number (34521984).

Almost surely, 2^266998939 is an apocalyptic number.

266998939 is a deficient number, since it is larger than the sum of its proper divisors (9176933).

266998939 is a wasteful number, since it uses less digits than its factorization.

266998939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17657.

The product of its digits is 11337408, while the sum is 61.

The square root of 266998939 is about 16340.1021722632. The cubic root of 266998939 is about 643.9268166199.

The spelling of 266998939 in words is "two hundred sixty-six million, nine hundred ninety-eight thousand, nine hundred thirty-nine".