266401245 has 16 divisors (see below), whose sum is σ = 464991552. Its totient is φ = 129164160.

The previous prime is 266401243. The next prime is 266401277. The reversal of 266401245 is 542104662.

It is not a de Polignac number, because 266401245 - 2¹ = 266401243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266401241) 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 15 ways as a sum of consecutive naturals, for example, 807112 + ... + 807441.

It is an arithmetic number, because the mean of its divisors is an integer number (29061972).

Almost surely, 2^266401245 is an apocalyptic number.

It is an amenable number.

266401245 is a deficient number, since it is larger than the sum of its proper divisors (198590307).

266401245 is a wasteful number, since it uses less digits than its factorization.

266401245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614572.

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

The square root of 266401245 is about 16321.8027496965. The cubic root of 266401245 is about 643.4459673450.

The spelling of 266401245 in words is "two hundred sixty-six million, four hundred one thousand, two hundred forty-five".