665274742 has 16 divisors (see below), whose sum is σ = 1098622800. Its totient is φ = 299622240.

The previous prime is 665274677. The next prime is 665274749. The reversal of 665274742 is 247472566.

It is a super-3 number, since 3×665274742³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665274749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136317 + ... + 141112.

It is an arithmetic number, because the mean of its divisors is an integer number (68663925).

Almost surely, 2^665274742 is an apocalyptic number.

665274742 is a deficient number, since it is larger than the sum of its proper divisors (433348058).

665274742 is a wasteful number, since it uses less digits than its factorization.

665274742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277551.

The product of its digits is 564480, while the sum is 43.

The square root of 665274742 is about 25792.9203852530. The cubic root of 665274742 is about 872.9720620157.

The spelling of 665274742 in words is "six hundred sixty-five million, two hundred seventy-four thousand, seven hundred forty-two".