551061116666 has 4 divisors (see below), whose sum is σ = 826591675002. Its totient is φ = 275530558332.

The previous prime is 551061116647. The next prime is 551061116677. The reversal of 551061116666 is 666611160155.

551061116666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 511332255625 + 39728861041 = 715075^2 + 199321^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137765279165 + ... + 137765279168.

Almost surely, 2^551061116666 is an apocalyptic number.

551061116666 is a deficient number, since it is larger than the sum of its proper divisors (275530558336).

551061116666 is a wasteful number, since it uses less digits than its factorization.

551061116666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275530558335.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 551061116666 in words is "five hundred fifty-one billion, sixty-one million, one hundred sixteen thousand, six hundred sixty-six".