664234419 has 8 divisors (see below), whose sum is σ = 887585680. Its totient is φ = 441853056.

The previous prime is 664234393. The next prime is 664234451. The reversal of 664234419 is 914432466.

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

It is not a de Polignac number, because 664234419 - 2¹² = 664230323 is a prime.

It is a super-2 number, since 2×664234419² = 882414726768535122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664234469) 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, 240874 + ... + 243615.

It is an arithmetic number, because the mean of its divisors is an integer number (110948210).

Almost surely, 2^664234419 is an apocalyptic number.

664234419 is a deficient number, since it is larger than the sum of its proper divisors (223351261).

664234419 is a wasteful number, since it uses less digits than its factorization.

664234419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484949.

The product of its digits is 124416, while the sum is 39.

The square root of 664234419 is about 25772.7456628121. The cubic root of 664234419 is about 872.5167880996.

The spelling of 664234419 in words is "six hundred sixty-four million, two hundred thirty-four thousand, four hundred nineteen".