659800066 has 8 divisors (see below), whose sum is σ = 992504844. Its totient is φ = 328965120.

The previous prime is 659800051. The next prime is 659800091. The reversal of 659800066 is 660008956.

It can be written as a sum of positive squares in 2 ways, for example, as 659205625 + 594441 = 25675^2 + 771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×659800066² = 870672254187208712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466575 + ... + 467986.

Almost surely, 2^659800066 is an apocalyptic number.

659800066 is a deficient number, since it is larger than the sum of its proper divisors (332704778).

659800066 is a wasteful number, since it uses less digits than its factorization.

659800066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934916.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 659800066 is about 25686.5736523967. The cubic root of 659800066 is about 870.5708439301.

The spelling of 659800066 in words is "six hundred fifty-nine million, eight hundred thousand, sixty-six".