6654120660 has 72 divisors (see below), whose sum is σ = 22019096736. Its totient is φ = 1613119680.

The previous prime is 6654120659. The next prime is 6654120679. The reversal of 6654120660 is 660214566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1678354 + ... + 1682313.

It is an arithmetic number, because the mean of its divisors is an integer number (305820788).

Almost surely, 2^6654120660 is an apocalyptic number.

6654120660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6654120660 is an abundant number, since it is smaller than the sum of its proper divisors (15364976076).

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

6654120660 is a wasteful number, since it uses less digits than its factorization.

6654120660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360693 (or 3360688 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 6654120660 is about 81572.7936263066. The cubic root of 6654120660 is about 1880.8906919515.

The spelling of 6654120660 in words is "six billion, six hundred fifty-four million, one hundred twenty thousand, six hundred sixty".