266648387136 has 56 divisors (see below), whose sum is σ = 715171710624. Its totient is φ = 87665218560.

The previous prime is 266648387123. The next prime is 266648387147. The reversal of 266648387136 is 631783846662.

It is a super-2 number, since 2×266648387136² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266648387136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9498270 + ... + 9526301.

It is an arithmetic number, because the mean of its divisors is an integer number (12770923404).

Almost surely, 2^266648387136 is an apocalyptic number.

It is an amenable number.

266648387136 is an abundant number, since it is smaller than the sum of its proper divisors (448523323488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266648387136 is a wasteful number, since it uses less digits than its factorization.

266648387136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19024659 (or 19024649 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 60.

The spelling of 266648387136 in words is "two hundred sixty-six billion, six hundred forty-eight million, three hundred eighty-seven thousand, one hundred thirty-six".