1606059661 has 2 divisors, whose sum is σ = 1606059662. Its totient is φ = 1606059660.

The previous prime is 1606059647. The next prime is 1606059671. The reversal of 1606059661 is 1669506061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 859076100 + 746983561 = 29310^2 + 27331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606059661 - 2⁹ = 1606059149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606059601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803029830 + 803029831.

It is an arithmetic number, because the mean of its divisors is an integer number (803029831).

Almost surely, 2^1606059661 is an apocalyptic number.

It is an amenable number.

1606059661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606059661 is an equidigital number, since it uses as much as digits as its factorization.

1606059661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 1606059661 is about 40075.6741802306. The cubic root of 1606059661 is about 1171.0817815161.

The spelling of 1606059661 in words is "one billion, six hundred six million, fifty-nine thousand, six hundred sixty-one".