266690897 has 24 divisors (see below), whose sum is σ = 310390080. Its totient is φ = 228333600.

The previous prime is 266690863. The next prime is 266690929. The reversal of 266690897 is 798096662.

It is not a de Polignac number, because 266690897 - 2¹² = 266686801 is a prime.

It is a super-4 number, since 4×266690897⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (266696897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 714803 + ... + 715175.

It is an arithmetic number, because the mean of its divisors is an integer number (12932920).

Almost surely, 2^266690897 is an apocalyptic number.

It is an amenable number.

266690897 is a deficient number, since it is larger than the sum of its proper divisors (43699183).

266690897 is a wasteful number, since it uses less digits than its factorization.

266690897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 266690897 is about 16330.6735011144. The cubic root of 266690897 is about 643.6790842547.

The spelling of 266690897 in words is "two hundred sixty-six million, six hundred ninety thousand, eight hundred ninety-seven".