6512220660 has 96 divisors (see below), whose sum is σ = 19969794432. Its totient is φ = 1572536320.

The previous prime is 6512220653. The next prime is 6512220677. The reversal of 6512220660 is 660222156.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150424 + ... + 188816.

It is an arithmetic number, because the mean of its divisors is an integer number (208018692).

Almost surely, 2^6512220660 is an apocalyptic number.

6512220660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6512220660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9984897216).

6512220660 is an abundant number, since it is smaller than the sum of its proper divisors (13457573772).

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

6512220660 is a wasteful number, since it uses less digits than its factorization.

6512220660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38673 (or 38671 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6512220660 is about 80698.3312095114. The cubic root of 6512220660 is about 1867.4244295228.

The spelling of 6512220660 in words is "six billion, five hundred twelve million, two hundred twenty thousand, six hundred sixty".