1660051517 has 2 divisors, whose sum is σ = 1660051518. Its totient is φ = 1660051516.

The previous prime is 1660051493. The next prime is 1660051537. The reversal of 1660051517 is 7151500661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1402577401 + 257474116 = 37451^2 + 16046^2 .

It is an emirp because it is prime and its reverse (7151500661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660051517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660051537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830025758 + 830025759.

It is an arithmetic number, because the mean of its divisors is an integer number (830025759).

Almost surely, 2^1660051517 is an apocalyptic number.

It is an amenable number.

1660051517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660051517 is an equidigital number, since it uses as much as digits as its factorization.

1660051517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 1660051517 is about 40743.7297875391. The cubic root of 1660051517 is about 1184.0603961327.

The spelling of 1660051517 in words is "one billion, six hundred sixty million, fifty-one thousand, five hundred seventeen".