6615720 has 192 divisors, whose sum is σ = 24261120. Its totient is φ = 1554432.

The previous prime is 6615677. The next prime is 6615727. The reversal of 6615720 is 275166.

It is a super-2 number, since 2×6615720² = 87535502236800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140737 + ... + 140783.

It is an arithmetic number, because the mean of its divisors is an integer number (126360).

Almost surely, 2^6615720 is an apocalyptic number.

6615720 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 6615720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12130560).

6615720 is an abundant number, since it is smaller than the sum of its proper divisors (17645400).

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

6615720 is a wasteful number, since it uses less digits than its factorization.

6615720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 6615720 is about 2572.1041969563. The cubic root of 6615720 is about 187.7265528168.

It can be divided in two parts, 66 and 15720, that multiplied together give a triangular number (1037520 = T₁₄₄₀).

The spelling of 6615720 in words is "six million, six hundred fifteen thousand, seven hundred twenty".