5665066566 has 16 divisors (see below), whose sum is σ = 11822747904. Its totient is φ = 1806253064.

The previous prime is 5665066531. The next prime is 5665066577. The reversal of 5665066566 is 6656605665.

It is a happy number.

It is a super-2 number, since 2×5665066566² = 64185958394422064712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20525466 + ... + 20525741.

It is an arithmetic number, because the mean of its divisors is an integer number (738921744).

Almost surely, 2^5665066566 is an apocalyptic number.

5665066566 is an abundant number, since it is smaller than the sum of its proper divisors (6157681338).

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

5665066566 is a wasteful number, since it uses less digits than its factorization.

5665066566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41051235.

The product of its (nonzero) digits is 5832000, while the sum is 51.

The square root of 5665066566 is about 75266.6364732741. The cubic root of 5665066566 is about 1782.6592585691.

The spelling of 5665066566 in words is "five billion, six hundred sixty-five million, sixty-six thousand, five hundred sixty-six".