665065742 has 16 divisors (see below), whose sum is σ = 1092172464. Its totient is φ = 301224000.

The previous prime is 665065741. The next prime is 665065777. The reversal of 665065742 is 247560566.

It is a self number, because there is not a number n which added to its sum of digits gives 665065742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665065741) 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 7 ways as a sum of consecutive naturals, for example, 47609 + ... + 59972.

It is an arithmetic number, because the mean of its divisors is an integer number (68260779).

Almost surely, 2^665065742 is an apocalyptic number.

665065742 is a deficient number, since it is larger than the sum of its proper divisors (427106722).

665065742 is a wasteful number, since it uses less digits than its factorization.

665065742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107875.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 665065742 is about 25788.8685676592. The cubic root of 665065742 is about 872.8806359933.

The spelling of 665065742 in words is "six hundred sixty-five million, sixty-five thousand, seven hundred forty-two".