266398420461 has 8 divisors (see below), whose sum is σ = 357753275040. Its totient is φ = 176321256432.

The previous prime is 266398420427. The next prime is 266398420487. The reversal of 266398420461 is 164024893662.

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

It is not a de Polignac number, because 266398420461 - 2⁶ = 266398420397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266398420261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319422150 + ... + 319422983.

It is an arithmetic number, because the mean of its divisors is an integer number (44719159380).

Almost surely, 2^266398420461 is an apocalyptic number.

It is an amenable number.

266398420461 is a deficient number, since it is larger than the sum of its proper divisors (91354854579).

266398420461 is a wasteful number, since it uses less digits than its factorization.

266398420461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638845275.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 266398420461 in words is "two hundred sixty-six billion, three hundred ninety-eight million, four hundred twenty thousand, four hundred sixty-one".