5665666045 has 8 divisors (see below), whose sum is σ = 7321783896. Its totient is φ = 4183876416.

The previous prime is 5665666021. The next prime is 5665666049. The reversal of 5665666045 is 5406665665.

It can be written as a sum of positive squares in 4 ways, for example, as 1094418724 + 4571247321 = 33082^2 + 67611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5665666045 - 2¹⁵ = 5665633277 is a prime.

It is a super-3 number, since 3×5665666045³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5665666045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665666049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43581982 + ... + 43582111.

It is an arithmetic number, because the mean of its divisors is an integer number (915222987).

Almost surely, 2^5665666045 is an apocalyptic number.

It is an amenable number.

5665666045 is a deficient number, since it is larger than the sum of its proper divisors (1656117851).

5665666045 is a wasteful number, since it uses less digits than its factorization.

5665666045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87164111.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The square root of 5665666045 is about 75270.6187366624. The cubic root of 5665666045 is about 1782.7221368592.

The spelling of 5665666045 in words is "five billion, six hundred sixty-five million, six hundred sixty-six thousand, forty-five".