6691466641966 has 4 divisors (see below), whose sum is σ = 10037199962952. Its totient is φ = 3345733320982.

The previous prime is 6691466641919. The next prime is 6691466641967.

6691466641966 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 6691466641895 and 6691466641904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691466641967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1672866660490 + ... + 1672866660493.

It is an arithmetic number, because the mean of its divisors is an integer number (2509299990738).

Almost surely, 2^{6691466641966} is an apocalyptic number.

6691466641966 is a deficient number, since it is larger than the sum of its proper divisors (3345733320986).

6691466641966 is a wasteful number, since it uses less digits than its factorization.

6691466641966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345733320985.

The product of its digits is 362797056, while the sum is 70.

The spelling of 6691466641966 in words is "six trillion, six hundred ninety-one billion, four hundred sixty-six million, six hundred forty-one thousand, nine hundred sixty-six".