266687228601 has 24 divisors (see below), whose sum is σ = 402531633504. Its totient is φ = 176434277760.

The previous prime is 266687228597. The next prime is 266687228603. The reversal of 266687228601 is 106822786662.

It is not a de Polignac number, because 266687228601 - 2² = 266687228597 is a prime.

It is a super-2 number, since 2×266687228601² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266687228603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4157016 + ... + 4220681.

It is an arithmetic number, because the mean of its divisors is an integer number (16772151396).

Almost surely, 2^266687228601 is an apocalyptic number.

It is an amenable number.

266687228601 is a deficient number, since it is larger than the sum of its proper divisors (135844404903).

266687228601 is an equidigital number, since it uses as much as digits as its factorization.

266687228601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377843 (or 8377831 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 266687228601 in words is "two hundred sixty-six billion, six hundred eighty-seven million, two hundred twenty-eight thousand, six hundred one".