6730747521 has 16 divisors (see below), whose sum is σ = 9002534400. Its totient is φ = 4473082880.

The previous prime is 6730747487. The next prime is 6730747571. The reversal of 6730747521 is 1257470376.

It is a cyclic number.

It is not a de Polignac number, because 6730747521 - 2²³ = 6722358913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6730747571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2454211 + ... + 2456951.

It is an arithmetic number, because the mean of its divisors is an integer number (562658400).

Almost surely, 2^6730747521 is an apocalyptic number.

It is an amenable number.

6730747521 is a deficient number, since it is larger than the sum of its proper divisors (2271786879).

6730747521 is a wasteful number, since it uses less digits than its factorization.

6730747521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016.

The product of its (nonzero) digits is 246960, while the sum is 42.

The square root of 6730747521 is about 82041.1331040716. The cubic root of 6730747521 is about 1888.0830784065.

The spelling of 6730747521 in words is "six billion, seven hundred thirty million, seven hundred forty-seven thousand, five hundred twenty-one".