6720957601 has 2 divisors, whose sum is σ = 6720957602. Its totient is φ = 6720957600.

The previous prime is 6720957527. The next prime is 6720957637. The reversal of 6720957601 is 1067590276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6720064576 + 893025 = 81976^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 6720957601 - 2³¹ = 4573473953 is a prime.

It is not a weakly prime, because it can be changed into another prime (6720957671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360478800 + 3360478801.

It is an arithmetic number, because the mean of its divisors is an integer number (3360478801).

Almost surely, 2^6720957601 is an apocalyptic number.

It is an amenable number.

6720957601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720957601 is an equidigital number, since it uses as much as digits as its factorization.

6720957601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 6720957601 is about 81981.4466876500. The cubic root of 6720957601 is about 1887.1672241485.

The spelling of 6720957601 in words is "six billion, seven hundred twenty million, nine hundred fifty-seven thousand, six hundred one".