6720666715 has 8 divisors (see below), whose sum is σ = 9216914400. Its totient is φ = 4608457152.

The previous prime is 6720666709. The next prime is 6720666739. The reversal of 6720666715 is 5176660276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6720666715 - 2⁷ = 6720666587 is a prime.

It is a super-2 number, since 2×6720666715² = 90334722188217782450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96009490 + ... + 96009559.

It is an arithmetic number, because the mean of its divisors is an integer number (1152114300).

Almost surely, 2^6720666715 is an apocalyptic number.

6720666715 is a deficient number, since it is larger than the sum of its proper divisors (2496247685).

6720666715 is a wasteful number, since it uses less digits than its factorization.

6720666715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192019061.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 6720666715 is about 81979.6725719248. The cubic root of 6720666715 is about 1887.1399979466.

The spelling of 6720666715 in words is "six billion, seven hundred twenty million, six hundred sixty-six thousand, seven hundred fifteen".