664683437 has 8 divisors (see below), whose sum is σ = 725496960. Its totient is φ = 603934560.

The previous prime is 664683421. The next prime is 664683443. The reversal of 664683437 is 734386466.

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

It is a cyclic number.

It is not a de Polignac number, because 664683437 - 2⁴ = 664683421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664683391 and 664683400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664683407) 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, 6764 + ... + 37082.

It is an arithmetic number, because the mean of its divisors is an integer number (90687120).

Almost surely, 2^664683437 is an apocalyptic number.

It is an amenable number.

664683437 is a deficient number, since it is larger than the sum of its proper divisors (60813523).

664683437 is a wasteful number, since it uses less digits than its factorization.

664683437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32323.

The product of its digits is 1741824, while the sum is 47.

The square root of 664683437 is about 25781.4552925160. The cubic root of 664683437 is about 872.7133489752.

The spelling of 664683437 in words is "six hundred sixty-four million, six hundred eighty-three thousand, four hundred thirty-seven".