1660155017 has 2 divisors, whose sum is σ = 1660155018. Its totient is φ = 1660155016.

The previous prime is 1660154999. The next prime is 1660155031. The reversal of 1660155017 is 7105510661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030345801 + 629809216 = 32099^2 + 25096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660155017 - 2⁶ = 1660154953 is a prime.

It is a super-2 number, since 2×1660155017² = 5512229360940540578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1660155037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830077508 + 830077509.

It is an arithmetic number, because the mean of its divisors is an integer number (830077509).

Almost surely, 2^1660155017 is an apocalyptic number.

It is an amenable number.

1660155017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660155017 is an equidigital number, since it uses as much as digits as its factorization.

1660155017 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 1660155017 is about 40744.9999018284. Note that the first 4 decimals coincide. The cubic root of 1660155017 is about 1184.0850033418.

Adding to 1660155017 its reverse (7105510661), we get a palindrome (8765665678).

The spelling of 1660155017 in words is "one billion, six hundred sixty million, one hundred fifty-five thousand, seventeen".