6666477552 has 140 divisors (see below), whose sum is σ = 22132375600. Its totient is φ = 1904684544.

The previous prime is 6666477547. The next prime is 6666477583. The reversal of 6666477552 is 2557746666.

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

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 40824 + ... + 122472.

Almost surely, 2^6666477552 is an apocalyptic number.

It is a pronic number, being equal to 81648×81649.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666477552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11066187800).

6666477552 is an abundant number, since it is smaller than the sum of its proper divisors (15465898048).

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

6666477552 is an equidigital number, since it uses as much as digits as its factorization.

6666477552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81682 (or 81661 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 54.

The square root of 6666477552 is about 81648.4999984690. The cubic root of 6666477552 is about 1882.0542612223.

The spelling of 6666477552 in words is "six billion, six hundred sixty-six million, four hundred seventy-seven thousand, five hundred fifty-two".