6664473774 has 96 divisors (see below), whose sum is σ = 17155756800. Its totient is φ = 1899459072.

The previous prime is 6664473769. The next prime is 6664473779. The reversal of 6664473774 is 4773744666.

It is an interprime number because it is at equal distance from previous prime (6664473769) and next prime (6664473779).

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

It is a self number, because there is not a number n which added to its sum of digits gives 6664473774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664473779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1525317 + ... + 1529679.

It is an arithmetic number, because the mean of its divisors is an integer number (178705800).

Almost surely, 2^6664473774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6664473774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8577878400).

6664473774 is an abundant number, since it is smaller than the sum of its proper divisors (10491283026).

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

6664473774 is a wasteful number, since it uses less digits than its factorization.

6664473774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836 (or 4824 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 54.

The square root of 6664473774 is about 81636.2283180697. The cubic root of 6664473774 is about 1881.8656760311.

The spelling of 6664473774 in words is "six billion, six hundred sixty-four million, four hundred seventy-three thousand, seven hundred seventy-four".