660850849 has 2 divisors, whose sum is σ = 660850850. Its totient is φ = 660850848.

The previous prime is 660850829. The next prime is 660850919. The reversal of 660850849 is 948058066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641710224 + 19140625 = 25332^2 + 4375^2 .

It is a cyclic number.

It is not a de Polignac number, because 660850849 - 2¹⁷ = 660719777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660850799 and 660850808.

It is not a weakly prime, because it can be changed into another prime (660850819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330425424 + 330425425.

It is an arithmetic number, because the mean of its divisors is an integer number (330425425).

Almost surely, 2^660850849 is an apocalyptic number.

It is an amenable number.

660850849 is a deficient number, since it is larger than the sum of its proper divisors (1).

660850849 is an equidigital number, since it uses as much as digits as its factorization.

660850849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 660850849 is about 25707.0194499479. The cubic root of 660850849 is about 871.0327494372.

The spelling of 660850849 in words is "six hundred sixty million, eight hundred fifty thousand, eight hundred forty-nine".