266780066828 has 24 divisors (see below), whose sum is σ = 509343320640. Its totient is φ = 121255114320.

The previous prime is 266780066807. The next prime is 266780066837. The reversal of 266780066828 is 828660087662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439583 + ... + 852521.

It is an arithmetic number, because the mean of its divisors is an integer number (21222638360).

Almost surely, 2^266780066828 is an apocalyptic number.

It is an amenable number.

266780066828 is a deficient number, since it is larger than the sum of its proper divisors (242563253812).

266780066828 is a wasteful number, since it uses less digits than its factorization.

266780066828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427637 (or 427635 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 266780066828 in words is "two hundred sixty-six billion, seven hundred eighty million, sixty-six thousand, eight hundred twenty-eight".