664655414 has 16 divisors (see below), whose sum is σ = 1016666640. Its totient is φ = 325797600.

The previous prime is 664655401. The next prime is 664655417. The reversal of 664655414 is 414556466.

It is a super-2 number, since 2×664655414² = 883533638719022792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664655417) 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, 36464 + ... + 51564.

It is an arithmetic number, because the mean of its divisors is an integer number (63541665).

Almost surely, 2^664655414 is an apocalyptic number.

664655414 is a deficient number, since it is larger than the sum of its proper divisors (352011226).

664655414 is a wasteful number, since it uses less digits than its factorization.

664655414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15535.

The product of its digits is 345600, while the sum is 41.

The square root of 664655414 is about 25780.9118147516. The cubic root of 664655414 is about 872.7010842948.

The spelling of 664655414 in words is "six hundred sixty-four million, six hundred fifty-five thousand, four hundred fourteen".