660799159 has 2 divisors, whose sum is σ = 660799160. Its totient is φ = 660799158.

The previous prime is 660799123. The next prime is 660799207. The reversal of 660799159 is 951997066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660799159 - 2¹³ = 660790967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660799109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330399579 + 330399580.

It is an arithmetic number, because the mean of its divisors is an integer number (330399580).

Almost surely, 2^660799159 is an apocalyptic number.

660799159 is a deficient number, since it is larger than the sum of its proper divisors (1).

660799159 is an equidigital number, since it uses as much as digits as its factorization.

660799159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 660799159 is about 25706.0140628609. The cubic root of 660799159 is about 871.0100388883.

The spelling of 660799159 in words is "six hundred sixty million, seven hundred ninety-nine thousand, one hundred fifty-nine".