6615720672 has 48 divisors (see below), whose sum is σ = 18945021312. Its totient is φ = 2004763520.

The previous prime is 6615720659. The next prime is 6615720673. The reversal of 6615720672 is 2760275166.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615720673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3131388 + ... + 3133499.

It is an arithmetic number, because the mean of its divisors is an integer number (394687944).

Almost surely, 2^6615720672 is an apocalyptic number.

It is an amenable number.

6615720672 is an abundant number, since it is smaller than the sum of its proper divisors (12329300640).

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

6615720672 is a wasteful number, since it uses less digits than its factorization.

6615720672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264911 (or 6264903 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 6615720672 is about 81337.0805475584. The cubic root of 6615720672 is about 1877.2655917298.

The spelling of 6615720672 in words is "six billion, six hundred fifteen million, seven hundred twenty thousand, six hundred seventy-two".