6720642 has 48 divisors (see below), whose sum is σ = 15718560. Its totient is φ = 2068416.

The previous prime is 6720629. The next prime is 6720667. The reversal of 6720642 is 2460276.

6720642 = 194² + 195² + ... + 301².

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14478 + ... + 14934.

It is an arithmetic number, because the mean of its divisors is an integer number (327470).

Almost surely, 2^6720642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6720642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7859280).

6720642 is an abundant number, since it is smaller than the sum of its proper divisors (8997918).

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

6720642 is a wasteful number, since it uses less digits than its factorization.

6720642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 6720642 is about 2592.4201048441. The cubic root of 6720642 is about 188.7137684648.

The spelling of 6720642 in words is "six million, seven hundred twenty thousand, six hundred forty-two".