67060799521 has 9 divisors (see below), whose sum is σ = 71242273561. Its totient is φ = 63111903232.

The previous prime is 67060799483. The next prime is 67060799543. The reversal of 67060799521 is 12599706076.

It is a happy number.

The square root of 67060799521 is 258961.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 496799521 + 66564000000 = 22289^2 + 258000^2 .

It is not a de Polignac number, because 67060799521 - 2⁹ = 67060799009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67060799621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4394721 + ... + 4409953.

Almost surely, 2^67060799521 is an apocalyptic number.

67060799521 is the 258961-st square number.

67060799521 is the 129481-st centered octagonal number.

It is an amenable number.

67060799521 is a deficient number, since it is larger than the sum of its proper divisors (4181474040).

67060799521 is an frugal number, since it uses more digits than its factorization.

67060799521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30500 (or 15250 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 52.

The spelling of 67060799521 in words is "sixty-seven billion, sixty million, seven hundred ninety-nine thousand, five hundred twenty-one".