6546641966 has 4 divisors (see below), whose sum is σ = 9819962952. Its totient is φ = 3273320982.

The previous prime is 6546641963. The next prime is 6546641999. The reversal of 6546641966 is 6691466456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6546641963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1636660490 + ... + 1636660493.

It is an arithmetic number, because the mean of its divisors is an integer number (2454990738).

Almost surely, 2^6546641966 is an apocalyptic number.

6546641966 is a deficient number, since it is larger than the sum of its proper divisors (3273320986).

6546641966 is a wasteful number, since it uses less digits than its factorization.

6546641966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273320985.

The product of its digits is 5598720, while the sum is 53.

The square root of 6546641966 is about 80911.3216181765. The cubic root of 6546641966 is about 1870.7088322931.

The spelling of 6546641966 in words is "six billion, five hundred forty-six million, six hundred forty-one thousand, nine hundred sixty-six".