660170617 has 2 divisors, whose sum is σ = 660170618. Its totient is φ = 660170616.

The previous prime is 660170591. The next prime is 660170627. The reversal of 660170617 is 716071066.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488586816 + 171583801 = 22104^2 + 13099^2 .

It is a cyclic number.

It is not a de Polignac number, because 660170617 - 2²³ = 651782009 is a prime.

It is a pancake number, because a pancake can be divided into 660170617 parts by 36336 straight cuts.

It is equal to p_34294624 and since 660170617 and 34294624 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (660170627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330085308 + 330085309.

It is an arithmetic number, because the mean of its divisors is an integer number (330085309).

Almost surely, 2^660170617 is an apocalyptic number.

It is an amenable number.

660170617 is a deficient number, since it is larger than the sum of its proper divisors (1).

660170617 is an equidigital number, since it uses as much as digits as its factorization.

660170617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 660170617 is about 25693.7855716124. The cubic root of 660170617 is about 870.7337874954.

The spelling of 660170617 in words is "six hundred sixty million, one hundred seventy thousand, six hundred seventeen".