6604964138 has 4 divisors (see below), whose sum is σ = 9907446210. Its totient is φ = 3302482068.

The previous prime is 6604964137. The next prime is 6604964143. The reversal of 6604964138 is 8314694066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3391548169 + 3213415969 = 58237^2 + 56687^2 .

It is a super-4 number, since 4×6604964138⁴ (a number of 40 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6604964092 and 6604964101.

It is not an unprimeable number, because it can be changed into a prime (6604964137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1651241033 + ... + 1651241036.

Almost surely, 2^6604964138 is an apocalyptic number.

6604964138 is a deficient number, since it is larger than the sum of its proper divisors (3302482072).

6604964138 is a wasteful number, since it uses less digits than its factorization.

6604964138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302482071.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 6604964138 is about 81270.9304610203. The cubic root of 6604964138 is about 1876.2476212541.

The spelling of 6604964138 in words is "six billion, six hundred four million, nine hundred sixty-four thousand, one hundred thirty-eight".