6720164738 has 16 divisors (see below), whose sum is σ = 11831642304. Its totient is φ = 2802230640.

The previous prime is 6720164713. The next prime is 6720164747. The reversal of 6720164738 is 8374610276.

It is a super-2 number, since 2×6720164738² = 90321228211717217288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6486128 + ... + 6487163.

It is an arithmetic number, because the mean of its divisors is an integer number (739477644).

Almost surely, 2^6720164738 is an apocalyptic number.

6720164738 is a deficient number, since it is larger than the sum of its proper divisors (5111477566).

6720164738 is a wasteful number, since it uses less digits than its factorization.

6720164738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12973337.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 6720164738 is about 81976.6109204327. The cubic root of 6720164738 is about 1887.0930123076.

The spelling of 6720164738 in words is "six billion, seven hundred twenty million, one hundred sixty-four thousand, seven hundred thirty-eight".