6601604351 has 4 divisors (see below), whose sum is σ = 6609646104. Its totient is φ = 6593562600.

The previous prime is 6601604323. The next prime is 6601604377. The reversal of 6601604351 is 1534061066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1534061066 = 2 ⋅767030533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6601604351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601604311) 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, 4019645 + ... + 4021286.

It is an arithmetic number, because the mean of its divisors is an integer number (1652411526).

Almost surely, 2^6601604351 is an apocalyptic number.

6601604351 is a deficient number, since it is larger than the sum of its proper divisors (8041753).

6601604351 is an equidigital number, since it uses as much as digits as its factorization.

6601604351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041752.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6601604351 is about 81250.2575442072. The cubic root of 6601604351 is about 1875.9294332267.

The spelling of 6601604351 in words is "six billion, six hundred one million, six hundred four thousand, three hundred fifty-one".