6720639093 has 48 divisors (see below), whose sum is σ = 12110891520. Its totient is φ = 3638223216.

The previous prime is 6720639089. The next prime is 6720639113. The reversal of 6720639093 is 3909360276.

6720639093 is a `hidden beast` number, since 6 + 7 + 2 + 0 + 639 + 0 + 9 + 3 = 666.

It is not a de Polignac number, because 6720639093 - 2² = 6720639089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720639073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71655 + ... + 136292.

It is an arithmetic number, because the mean of its divisors is an integer number (252310240).

Almost surely, 2^6720639093 is an apocalyptic number.

6720639093 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6720639093 is a deficient number, since it is larger than the sum of its proper divisors (5390252427).

6720639093 is a wasteful number, since it uses less digits than its factorization.

6720639093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207988 (or 207976 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 6720639093 is about 81979.5041031598. The cubic root of 6720639093 is about 1887.1374125557.

The spelling of 6720639093 in words is "six billion, seven hundred twenty million, six hundred thirty-nine thousand, ninety-three".