6650722520 has 64 divisors (see below), whose sum is σ = 16222127040. Its totient is φ = 2439360000.

The previous prime is 6650722517. The next prime is 6650722531. The reversal of 6650722520 is 252270566.

It is a super-2 number, since 2×6650722520² = 88464220076070300800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 36170 + ... + 120870.

It is an arithmetic number, because the mean of its divisors is an integer number (253470735).

Almost surely, 2^6650722520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6650722520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8111063520).

6650722520 is an abundant number, since it is smaller than the sum of its proper divisors (9571404520).

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

6650722520 is a wasteful number, since it uses less digits than its factorization.

6650722520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84876 (or 84872 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 6650722520 is about 81551.9620855317. The cubic root of 6650722520 is about 1880.5704583927.

The spelling of 6650722520 in words is "six billion, six hundred fifty million, seven hundred twenty-two thousand, five hundred twenty".