6615709420 has 96 divisors (see below), whose sum is σ = 14717541888. Its totient is φ = 2493038592.

The previous prime is 6615709381. The next prime is 6615709439. The reversal of 6615709420 is 249075166.

It is a super-2 number, since 2×6615709420² = 87535222259753472800, which contains 22 as substring.

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, 12649279 + ... + 12649801.

It is an arithmetic number, because the mean of its divisors is an integer number (153307728).

Almost surely, 2^6615709420 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 6615709420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7358770944).

6615709420 is an abundant number, since it is smaller than the sum of its proper divisors (8101832468).

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

6615709420 is a wasteful number, since it uses less digits than its factorization.

6615709420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 6615709420 is about 81337.0113785846. The cubic root of 6615709420 is about 1877.2645274464.

The spelling of 6615709420 in words is "six billion, six hundred fifteen million, seven hundred nine thousand, four hundred twenty".