664685014 has 8 divisors (see below), whose sum is σ = 1139460048. Its totient is φ = 284865000.

The previous prime is 664685009. The next prime is 664685029. The reversal of 664685014 is 410586466.

It is a happy number.

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

It is a super-3 number, since 3×664685014³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 23738737 + ... + 23738764.

It is an arithmetic number, because the mean of its divisors is an integer number (142432506).

Almost surely, 2^664685014 is an apocalyptic number.

664685014 is a deficient number, since it is larger than the sum of its proper divisors (474775034).

664685014 is a wasteful number, since it uses less digits than its factorization.

664685014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47477510.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 664685014 is about 25781.4858764967. The cubic root of 664685014 is about 872.7140391624.

The spelling of 664685014 in words is "six hundred sixty-four million, six hundred eighty-five thousand, fourteen".