266980956804 has 27 divisors (see below), whose sum is σ = 674876366437. Its totient is φ = 88992618864.

The previous prime is 266980956793. The next prime is 266980956821. The reversal of 266980956804 is 408659089662.

The square root of 266980956804 is 516702.

It is a perfect power (a square), and thus also a powerful number.

266980956804 is a `hidden beast` number, since 2 + 6 + 69 + 8 + 0 + 9 + 568 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 266925155904 = 7470^2 + 516648^2 .

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 3057154 + ... + 3143270.

Almost surely, 2^266980956804 is an apocalyptic number.

266980956804 is the 516702-nd square number.

It is an amenable number.

266980956804 is an abundant number, since it is smaller than the sum of its proper divisors (407895409633).

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

266980956804 is an frugal number, since it uses more digits than its factorization.

266980956804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172244 (or 86122 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 266980956804 in words is "two hundred sixty-six billion, nine hundred eighty million, nine hundred fifty-six thousand, eight hundred four".