266949497 has 4 divisors (see below), whose sum is σ = 270165840. Its totient is φ = 263733156.

The previous prime is 266949493. The next prime is 266949511. The reversal of 266949497 is 794949662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266949497 - 2² = 266949493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266949493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608047 + ... + 1608212.

It is an arithmetic number, because the mean of its divisors is an integer number (67541460).

Almost surely, 2^266949497 is an apocalyptic number.

It is an amenable number.

266949497 is a deficient number, since it is larger than the sum of its proper divisors (3216343).

266949497 is an equidigital number, since it uses as much as digits as its factorization.

266949497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216342.

The product of its digits is 5878656, while the sum is 56.

The square root of 266949497 is about 16338.5891985814. The cubic root of 266949497 is about 643.8870674044.

The spelling of 266949497 in words is "two hundred sixty-six million, nine hundred forty-nine thousand, four hundred ninety-seven".