1650066521 has 2 divisors, whose sum is σ = 1650066522. Its totient is φ = 1650066520.

The previous prime is 1650066499. The next prime is 1650066527. The reversal of 1650066521 is 1256600561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1365672025 + 284394496 = 36955^2 + 16864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650066521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1650066527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825033260 + 825033261.

It is an arithmetic number, because the mean of its divisors is an integer number (825033261).

Almost surely, 2^1650066521 is an apocalyptic number.

It is an amenable number.

1650066521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650066521 is an equidigital number, since it uses as much as digits as its factorization.

1650066521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1650066521 is about 40621.0108318343. The cubic root of 1650066521 is about 1181.6816301707.

The spelling of 1650066521 in words is "one billion, six hundred fifty million, sixty-six thousand, five hundred twenty-one".