266401793 has 8 divisors (see below), whose sum is σ = 320483520. Its totient is φ = 216326160.

The previous prime is 266401783. The next prime is 266401819. The reversal of 266401793 is 397104662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266401793 - 2⁸ = 266401537 is a prime.

It is a super-2 number, since 2×266401793² = 141939830627229698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266401783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001378 + ... + 1001643.

It is an arithmetic number, because the mean of its divisors is an integer number (40060440).

Almost surely, 2^266401793 is an apocalyptic number.

It is an amenable number.

266401793 is a deficient number, since it is larger than the sum of its proper divisors (54081727).

266401793 is a wasteful number, since it uses less digits than its factorization.

266401793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003047.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 266401793 is about 16321.8195370492. The cubic root of 266401793 is about 643.4464085444.

The spelling of 266401793 in words is "two hundred sixty-six million, four hundred one thousand, seven hundred ninety-three".