5646809966 has 16 divisors (see below), whose sum is σ = 9905368704. Its totient is φ = 2363780664.

The previous prime is 5646809921. The next prime is 5646809983. The reversal of 5646809966 is 6699086465.

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, 4689440 + ... + 4690643.

It is an arithmetic number, because the mean of its divisors is an integer number (619085544).

Almost surely, 2^5646809966 is an apocalyptic number.

5646809966 is a deficient number, since it is larger than the sum of its proper divisors (4258558738).

5646809966 is a wasteful number, since it uses less digits than its factorization.

5646809966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380135.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The square root of 5646809966 is about 75145.2591052822. The cubic root of 5646809966 is about 1780.7422278094.

The spelling of 5646809966 in words is "five billion, six hundred forty-six million, eight hundred nine thousand, nine hundred sixty-six".