5646666672 has 30 divisors (see below), whose sum is σ = 15802824492. Its totient is φ = 1882222176.

The previous prime is 5646666661. The next prime is 5646666703. The reversal of 5646666672 is 2766666465.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19606338 + ... + 19606625.

Almost surely, 2^5646666672 is an apocalyptic number.

It is an amenable number.

5646666672 is an abundant number, since it is smaller than the sum of its proper divisors (10156157820).

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

5646666672 is a wasteful number, since it uses less digits than its factorization.

5646666672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39212977 (or 39212968 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The square root of 5646666672 is about 75144.3056525243. The cubic root of 5646666672 is about 1780.7271649192.

The spelling of 5646666672 in words is "five billion, six hundred forty-six million, six hundred sixty-six thousand, six hundred seventy-two".