5561150666 has 4 divisors (see below), whose sum is σ = 8341726002. Its totient is φ = 2780575332.

The previous prime is 5561150659. The next prime is 5561150681. The reversal of 5561150666 is 6660511655.

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., 4073120041 + 1488030625 = 63821^2 + 38575^2 .

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 as a sum of consecutive naturals, namely, 1390287665 + ... + 1390287668.

Almost surely, 2^5561150666 is an apocalyptic number.

5561150666 is a deficient number, since it is larger than the sum of its proper divisors (2780575336).

5561150666 is a wasteful number, since it uses less digits than its factorization.

5561150666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780575335.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 5561150666 is about 74573.1229465415. The cubic root of 5561150666 is about 1771.6919850211.

The spelling of 5561150666 in words is "five billion, five hundred sixty-one million, one hundred fifty thousand, six hundred sixty-six".