6466770776646 has 48 divisors (see below), whose sum is σ = 14392616441424. Its totient is φ = 2096952846912.

The previous prime is 6466770776633. The next prime is 6466770776647.

6466770776646 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466770776647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2832240 + ... + 4577676.

It is an arithmetic number, because the mean of its divisors is an integer number (299846175863).

Almost surely, 2^{6466770776646} is an apocalyptic number.

6466770776646 is an abundant number, since it is smaller than the sum of its proper divisors (7925845664778).

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

6466770776646 is a wasteful number, since it uses less digits than its factorization.

6466770776646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751045 (or 1751042 counting only the distinct ones).

The product of its (nonzero) digits is 1792336896, while the sum is 72.

The spelling of 6466770776646 in words is "six trillion, four hundred sixty-six billion, seven hundred seventy million, seven hundred seventy-six thousand, six hundred forty-six".