5055509666 has 4 divisors (see below), whose sum is σ = 7583264502. Its totient is φ = 2527754832.

The previous prime is 5055509639. The next prime is 5055509677. The reversal of 5055509666 is 6669055505.

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., 3143284225 + 1912225441 = 56065^2 + 43729^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5055509666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263877415 + ... + 1263877418.

Almost surely, 2^5055509666 is an apocalyptic number.

5055509666 is a deficient number, since it is larger than the sum of its proper divisors (2527754836).

5055509666 is a wasteful number, since it uses less digits than its factorization.

5055509666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527754835.

The product of its (nonzero) digits is 1215000, while the sum is 47.

The square root of 5055509666 is about 71102.1073246075. The cubic root of 5055509666 is about 1716.2806852364.

The spelling of 5055509666 in words is "five billion, fifty-five million, five hundred nine thousand, six hundred sixty-six".