266220475431331 has 8 divisors (see below), whose sum is σ = 271250136862560. Its totient is φ = 261191059688832.

The previous prime is 266220475431179. The next prime is 266220475431341. The reversal of 266220475431331 is 133134574022662.

It is a happy number.

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 266220475431331 - 2³⁵ = 266186115692963 is a prime.

It is a super-2 number, since 2×266220475431331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266220475431341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59233846 + ... + 63569563.

It is an arithmetic number, because the mean of its divisors is an integer number (33906267107820).

Almost surely, 2^{266220475431331} is an apocalyptic number.

266220475431331 is a deficient number, since it is larger than the sum of its proper divisors (5029661431229).

266220475431331 is a wasteful number, since it uses less digits than its factorization.

266220475431331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122844365.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 266220475431331 in words is "two hundred sixty-six trillion, two hundred twenty billion, four hundred seventy-five million, four hundred thirty-one thousand, three hundred thirty-one".