664589149 has 4 divisors (see below), whose sum is σ = 759530464. Its totient is φ = 569647836.

The previous prime is 664589119. The next prime is 664589161. The reversal of 664589149 is 941985466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664589149 - 2⁹ = 664588637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664589096 and 664589105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664589119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47470647 + ... + 47470660.

It is an arithmetic number, because the mean of its divisors is an integer number (189882616).

Almost surely, 2^664589149 is an apocalyptic number.

It is an amenable number.

664589149 is a deficient number, since it is larger than the sum of its proper divisors (94941315).

664589149 is an equidigital number, since it uses as much as digits as its factorization.

664589149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94941314.

The product of its digits is 1866240, while the sum is 52.

The square root of 664589149 is about 25779.6266264661. The cubic root of 664589149 is about 872.6720810659.

The spelling of 664589149 in words is "six hundred sixty-four million, five hundred eighty-nine thousand, one hundred forty-nine".