665935606 has 16 divisors (see below), whose sum is σ = 1191239424. Its totient is φ = 272992104.

The previous prime is 665935603. The next prime is 665935607. The reversal of 665935606 is 606539566.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665935601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033740 + ... + 1034383.

It is an arithmetic number, because the mean of its divisors is an integer number (74452464).

Almost surely, 2^665935606 is an apocalyptic number.

665935606 is a deficient number, since it is larger than the sum of its proper divisors (525303818).

665935606 is a wasteful number, since it uses less digits than its factorization.

665935606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068155.

The product of its (nonzero) digits is 874800, while the sum is 46.

The square root of 665935606 is about 25805.7281625611. The cubic root of 665935606 is about 873.2610277855.

The spelling of 665935606 in words is "six hundred sixty-five million, nine hundred thirty-five thousand, six hundred six".