275800066 has 4 divisors (see below), whose sum is σ = 413700102. Its totient is φ = 137900032.

The previous prime is 275800013. The next prime is 275800069. The reversal of 275800066 is 660008572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 261954225 + 13845841 = 16185^2 + 3721^2 .

It is not an unprimeable number, because it can be changed into a prime (275800069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68950015 + ... + 68950018.

Almost surely, 2^275800066 is an apocalyptic number.

275800066 is a deficient number, since it is larger than the sum of its proper divisors (137900036).

275800066 is a wasteful number, since it uses less digits than its factorization.

275800066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137900035.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 275800066 is about 16607.2293294216. The cubic root of 275800066 is about 650.9257546464.

The spelling of 275800066 in words is "two hundred seventy-five million, eight hundred thousand, sixty-six".