266140245 has 64 divisors (see below), whose sum is σ = 511340544. Its totient is φ = 115568640.

The previous prime is 266140241. The next prime is 266140249. The reversal of 266140245 is 542041662.

It is an interprime number because it is at equal distance from previous prime (266140241) and next prime (266140249).

It is not a de Polignac number, because 266140245 - 2² = 266140241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266140241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 465810 + ... + 466380.

It is an arithmetic number, because the mean of its divisors is an integer number (7989696).

Almost surely, 2^266140245 is an apocalyptic number.

It is an amenable number.

266140245 is a deficient number, since it is larger than the sum of its proper divisors (245200299).

266140245 is a wasteful number, since it uses less digits than its factorization.

266140245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 266140245 is about 16313.8053500708. The cubic root of 266140245 is about 643.2357652842.

The spelling of 266140245 in words is "two hundred sixty-six million, one hundred forty thousand, two hundred forty-five".