7133660521 has 27 divisors (see below), whose sum is σ = 7920868239. Its totient is φ = 6421738752.

The previous prime is 7133660503. The next prime is 7133660531. The reversal of 7133660521 is 1250663317.

The square root of 7133660521 is 84461.

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

It can be written as a sum of positive squares in 13 ways, for example, as 7012220121 + 121440400 = 83739^2 + 11020^2 .

It is not a de Polignac number, because 7133660521 - 2⁷ = 7133660393 is a prime.

It is a super-2 number, since 2×7133660521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7133660531) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 80153445 + ... + 80153533.

Almost surely, 2^7133660521 is an apocalyptic number.

7133660521 is the 84461-st square number.

7133660521 is the 42231-st centered octagonal number.

It is an amenable number.

7133660521 is a deficient number, since it is larger than the sum of its proper divisors (787207718).

7133660521 is an frugal number, since it uses more digits than its factorization.

7133660521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The cubic root of 7133660521 is about 1925.0298996649.

The spelling of 7133660521 in words is "seven billion, one hundred thirty-three million, six hundred sixty thousand, five hundred twenty-one".