665745514 has 16 divisors (see below), whose sum is σ = 1172124288. Its totient is φ = 277607952.

The previous prime is 665745467. The next prime is 665745523. The reversal of 665745514 is 415547566.

It is a super-2 number, since 2×665745514² = 886434178822248392, which contains 22 as substring.

It is an unprimeable number.

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, 642094 + ... + 643129.

It is an arithmetic number, because the mean of its divisors is an integer number (73257768).

Almost surely, 2^665745514 is an apocalyptic number.

665745514 is a deficient number, since it is larger than the sum of its proper divisors (506378774).

665745514 is a wasteful number, since it uses less digits than its factorization.

665745514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285269.

The product of its digits is 504000, while the sum is 43.

The square root of 665745514 is about 25802.0447639330. The cubic root of 665745514 is about 873.1779287935.

The spelling of 665745514 in words is "six hundred sixty-five million, seven hundred forty-five thousand, five hundred fourteen".