6644774466 has 64 divisors (see below), whose sum is σ = 16664054400. Its totient is φ = 1944129600.

The previous prime is 6644774447. The next prime is 6644774467.

6644774466 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6644774467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175645 + ... + 210096.

It is an arithmetic number, because the mean of its divisors is an integer number (260375850).

Almost surely, 2^6644774466 is an apocalyptic number.

6644774466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6644774466 is an abundant number, since it is smaller than the sum of its proper divisors (10019279934).

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

6644774466 is a wasteful number, since it uses less digits than its factorization.

6644774466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385792 (or 385786 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The square root of 6644774466 is about 81515.4860501978. The cubic root of 6644774466 is about 1880.0096636368.

The spelling of 6644774466 in words is "six billion, six hundred forty-four million, seven hundred seventy-four thousand, four hundred sixty-six".