16660577 has 2 divisors, whose sum is σ = 16660578. Its totient is φ = 16660576.

The previous prime is 16660543. The next prime is 16660613. The reversal of 16660577 is 77506661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 4661281 = 3464^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 16660577 - 2¹⁴ = 16644193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16660577.

It is not a weakly prime, because it can be changed into another prime (16660517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330288 + 8330289.

It is an arithmetic number, because the mean of its divisors is an integer number (8330289).

Almost surely, 2^16660577 is an apocalyptic number.

It is an amenable number.

16660577 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660577 is an equidigital number, since it uses as much as digits as its factorization.

16660577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 16660577 is about 4081.7370076966. The cubic root of 16660577 is about 255.4053632147.

The spelling of 16660577 in words is "sixteen million, six hundred sixty thousand, five hundred seventy-seven".