266620276716 has 12 divisors (see below), whose sum is σ = 622113979032. Its totient is φ = 88873425568.

The previous prime is 266620276691. The next prime is 266620276729. The reversal of 266620276716 is 617672026662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×266620276716² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11109178185 + ... + 11109178208.

It is an arithmetic number, because the mean of its divisors is an integer number (51842831586).

Almost surely, 2^266620276716 is an apocalyptic number.

It is an amenable number.

266620276716 is an abundant number, since it is smaller than the sum of its proper divisors (355493702316).

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

266620276716 is a wasteful number, since it uses less digits than its factorization.

266620276716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22218356400 (or 22218356398 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 266620276716 in words is "two hundred sixty-six billion, six hundred twenty million, two hundred seventy-six thousand, seven hundred sixteen".