665694014 has 16 divisors (see below), whose sum is σ = 1077887520. Its totient is φ = 307396320.

The previous prime is 665694011. The next prime is 665694017. The reversal of 665694014 is 410496566.

It is an interprime number because it is at equal distance from previous prime (665694011) and next prime (665694017).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665694011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248177 + ... + 250844.

It is an arithmetic number, because the mean of its divisors is an integer number (67367970).

Almost surely, 2^665694014 is an apocalyptic number.

665694014 is a deficient number, since it is larger than the sum of its proper divisors (412193506).

665694014 is a wasteful number, since it uses less digits than its factorization.

665694014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499075.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 665694014 is about 25801.0467617110. The cubic root of 665694014 is about 873.1554127710.

The spelling of 665694014 in words is "six hundred sixty-five million, six hundred ninety-four thousand, fourteen".