565738666 has 8 divisors (see below), whose sum is σ = 848736900. Its totient is φ = 282826368.

The previous prime is 565738643. The next prime is 565738703. The reversal of 565738666 is 666837565.

565738666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 563065441 + 2673225 = 23729^2 + 1635^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191 + ... + 33658.

Almost surely, 2^565738666 is an apocalyptic number.

565738666 is a deficient number, since it is larger than the sum of its proper divisors (282998234).

565738666 is a wasteful number, since it uses less digits than its factorization.

565738666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42968.

The product of its digits is 5443200, while the sum is 52.

The square root of 565738666 is about 23785.2615289385. The cubic root of 565738666 is about 827.0630538822.

The spelling of 565738666 in words is "five hundred sixty-five million, seven hundred thirty-eight thousand, six hundred sixty-six".