664835413 has 8 divisors (see below), whose sum is σ = 725616576. Its totient is φ = 604111200.

The previous prime is 664835407. The next prime is 664835419. The reversal of 664835413 is 314538466.

It is an interprime number because it is at equal distance from previous prime (664835407) and next prime (664835419).

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

It is a de Polignac number, because none of the positive numbers 2^k-664835413 is a prime.

It is a super-2 number, since 2×664835413² = 884012252757761138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664835419) 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, 12345 + ... + 38497.

It is an arithmetic number, because the mean of its divisors is an integer number (90702072).

Almost surely, 2^664835413 is an apocalyptic number.

It is an amenable number.

664835413 is a deficient number, since it is larger than the sum of its proper divisors (60781163).

664835413 is a wasteful number, since it uses less digits than its factorization.

664835413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28475.

The product of its digits is 207360, while the sum is 40.

The square root of 664835413 is about 25784.4025139230. The cubic root of 664835413 is about 872.7798575162.

The spelling of 664835413 in words is "six hundred sixty-four million, eight hundred thirty-five thousand, four hundred thirteen".