606566661 has 16 divisors (see below), whose sum is σ = 820051200. Its totient is φ = 398743488.

The previous prime is 606566627. The next prime is 606566663. The reversal of 606566661 is 166665606.

It is a de Polignac number, because none of the positive numbers 2^k-606566661 is a prime.

It is a super-2 number, since 2×606566661² = 735846228473377842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606566663) 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 in 15 ways as a sum of consecutive naturals, for example, 292135 + ... + 294203.

It is an arithmetic number, because the mean of its divisors is an integer number (51253200).

Almost surely, 2^606566661 is an apocalyptic number.

It is an amenable number.

606566661 is a deficient number, since it is larger than the sum of its proper divisors (213484539).

606566661 is a wasteful number, since it uses less digits than its factorization.

606566661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 606566661 is about 24628.5740756545. The cubic root of 606566661 is about 846.4984725073.

The spelling of 606566661 in words is "six hundred six million, five hundred sixty-six thousand, six hundred sixty-one".