2066702521 has 15 divisors (see below), whose sum is σ = 2247275771. Its totient is φ = 1900633488.

The previous prime is 2066702459. The next prime is 2066702527. The reversal of 2066702521 is 1252076602.

The square root of 2066702521 is 45461.

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

It can be written as a sum of positive squares in 7 ways, for example, as 1553226921 + 513475600 = 39411^2 + 22660^2 .

It is not a de Polignac number, because 2066702521 - 2²¹ = 2064605369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2066702527) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7682775 + ... + 7683043.

Almost surely, 2^2066702521 is an apocalyptic number.

2066702521 is the 45461-st square number.

2066702521 is the 22731-st centered octagonal number.

It is an amenable number.

2066702521 is a deficient number, since it is larger than the sum of its proper divisors (180573250).

2066702521 is an frugal number, since it uses more digits than its factorization.

2066702521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The cubic root of 2066702521 is about 1273.7748109551.

The spelling of 2066702521 in words is "two billion, sixty-six million, seven hundred two thousand, five hundred twenty-one".