266729397 has 16 divisors (see below), whose sum is σ = 388384320. Its totient is φ = 161481600.

The previous prime is 266729389. The next prime is 266729423. The reversal of 266729397 is 793927662.

It is not a de Polignac number, because 266729397 - 2³ = 266729389 is a prime.

It is a super-2 number, since 2×266729397² = 142289142447967218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266729357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31497 + ... + 39057.

It is an arithmetic number, because the mean of its divisors is an integer number (24274020).

Almost surely, 2^266729397 is an apocalyptic number.

It is an amenable number.

266729397 is a deficient number, since it is larger than the sum of its proper divisors (121654923).

266729397 is a wasteful number, since it uses less digits than its factorization.

266729397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8644.

The product of its digits is 1714608, while the sum is 51.

The square root of 266729397 is about 16331.8522219618. The cubic root of 266729397 is about 643.7100570058.

The spelling of 266729397 in words is "two hundred sixty-six million, seven hundred twenty-nine thousand, three hundred ninety-seven".